Clarke has already added eleven players to his squad over recent weeks as he looks to build a team capable of making a challenge on the title as he looks to steady the ship following last season's drop to the fourth tier of English football.
22-year-old Jules began his career at Reading, rising through the ranks to turn professional in 2015. Despite earning pro terms, Zak failed to make a first-team appearance for the Royals but did enjoy loan spells with Hemel Hempstead Town, Braintree Town, and Motherwell.
Zak penned a two-year deal with Shrewsbury Town in June 2017 but failed to make a single first-team appearance for the Montgomery Waters Meadow side, although he did earn some football with loan sells at Chesterfield, Port Vale, and Barnet.
Islington-born Jules' Shrews nightmare came to an end in January as he agreed to join Sol Campbell's Macclesfield, and went on to play a key role in the Silkmen's successful survival fight in League Two.
Jules' consistent performances are said to have alerted a number of Championship and League One clubs, but the Saddlers have moved quickly to agree a deal to sign the Scotland Under-21 international with news expected to be confirmed soon.