I'm playing low. If they play a club back, I'll insert the 9. The only reason to play a different club is to dissuade them from playing a club back, and I don't mind a club back.
Spoiler
Yes, yes, I know, hearts are going to be split 4-0 with West, so it's going to be a club ruff by West and overruff by North, heart to the ace, discovering the split, another heart, now East shows up miraculously with the spade ace (the spade ace, a heart void, and he didn't bid spades) and a club ruff for down 1.
However, I don't think playing a higher club makes a difference. If hearts are 3-1 or the spade ace is where it's supposed to be, and and I sluff a useful club, I'm going to end up with a worthless club at the end of the hand, that I'll have to try a diamond finesse to get rid of it. If I want to get rid of the club that way, then on a club return (ruff and overruff) I can play a heart to the ace, finesse the diamond, and discard the singleton spade on the ace of diamonds.
W N E S
1♠ 2♦ 3♣ 3♥
3♠ X P 4♥
X P P P
4♥XS