Hardy, a product of Manchester City’s academy, had spent the previous four seasons with National League hopefuls AFC Fylde before joining the Saddlers on a two-year deal.
The former England C international scored 16 goals in 44 league appearances for Fylde and helped them reach the National League play-off final last term.
It is understood the 23-year-old turned down several more lucrative offers to remain in the National League, in favour of a switch to Banks's Stadium and taking his first shot at league football.
Clarke, who is keen to target clubs for their brightest and best, believes that speaks volumes about James' character, admitting his hunger is something that will take him far in the game.
Speaking via the Express & Star, Darrell said; "The lad’s hunger to want to play in the league and not just fill his bank account in non-league, coming here on a much-reduced salary to prove a point, was great for me.
"We want hungry players who the fans can enjoy watching. He can create a lot of things at the top end of the pitch. He has unbelievable talent. But he is also hardened, having played 100 games in non-league."