The 23-year-old secured a switch from North London to the Stadium of Light during the summer transfer window of 2022 for a fee of around £1.5m.
Clarke had spent the second half of the 2021-22 term on loan at Sunderland, who secured promotion to the Championship under the leadership of Tony Mowbray.
Since taking to the field in the second tier, the former Spurs youngster has been arguably the star man for the North-East club, providing 40 goal contributions in the Championship over the past two years.
Featuring for Regis Le Bris's troops in pre-season, Clarke has continued his goalscoring form, holding his nerve from 12 yards during friendlies against Gateshead and Nottingham Forest.
Tottenham preparing for Clarke windall thanks to Ipswich Town?
According to Sunderland specialist James Copley, Tottenham are preparing to benefit financially from Clarke's potential exit of Sunderland this summer.
The report claims that the Lilywhites inserted a 25% sell-on clause in the deal with the Black Cats that allowed the winger to switch to the Championship club in 2022.
It is understood that Premier League newcomers Ipswich Town are set to make a bid for Clarke, who could be in line for a top-flight move.
Kieran McKenna's side have already recruited a number of players who impressed in the Championship last term, including Jacob Greaves from Hull City and Omari Hutchinson.
It is believed that Sunderland are demanding at least £25m for Clarke, who has scored 27 goals in 112 appearances for the Black Cats over 30 months.
Southampton also 'keen' on Sunderland's Clarke
As well as the Tractor Boys, it is said that fellow promotion winners Southampton are monitoring Clarke's situation ahead of the new campaign.
Russell Martin's men are in the market for attacking reinforcements following the departure of Scotland international Che Adams to Italian side Torino earlier this week.
Clarke helped inflict the Saints with a heavy defeat during the early stages of last season, with the 23-year-old's first-minute strike commencing the fun for Sunderland during their 5-0 demolition of the South-coast club.
Earning promotion via the playoffs, Southampton definitely enjoyed the last laugh and could now severely weaken the Black Cats' best XI by luring Clarke away from the Stadium of Light.