Date of birth
Young defender made a permanent switch to Fratton Park in the summer of 2016 after impressing on loan from Ipswich the previous season.
Made 29 appearances for Pompey in 2015/16, scoring once, before signing permanently as part of a deal that saw fellow centre-half Adam Webster head in the opposite direction.
Clarke would go on to play 33 times in Sky Bet League Two for Pompey in 2016/17, scoring once.
Establishing himself in the side, he became a key part of the meanest defence in the division, as the Blues shipped just 40 goals all season en route to lifting the title.
A product of the youth academy at Portman Road, the centre-back made five senior appearances for the Championship outfit after turning professional in 2014.