I hadn't played a lot of hands against villain (maybe 25 or so) but he was clearly a fish. His VPIP/PFR were about 80/20 (though the sample size was small). He also 3bet quite often, though again, the sample size was small. I have no idea what his limp/raise means for his range.

If the flop wasn't only clubs, it would have been a great flop. How would you have played this hand? I raised the flop since I didn't want a fourth club to appear, but of course if villain already had a flush that's pointless. Should I have made the call? Also, how would you play such a hand against an unknown player? Because it's quite an interesting situation.

PokerStars, Hold'em No Limit - $0.01/$0.02 - 6 players
Replay this hand on Upswing Poker

UTG: $2.05 (103 bb)
MP: $2.30 (115 bb)
CO (Hero): $1.96 (98 bb)
BU: $2.46 (123 bb)
SB: $2.00 (100 bb)
BB: $2.00 (100 bb)

Pre-Flop: ($0.03) Hero is CO with 6♦ 6♥
1 fold, MP calls $0.02, Hero raises to $0.08, 3 players fold, MP 3-bets to $0.14, Hero calls $0.06

Flop: ($0.31) A♣ 6♣ J♣ (2 players)
MP bets $0.14, Hero raises to $0.43, MP calls $0.29

Turn: ($1.17) 5♥ (2 players)
MP checks, Hero bets $0.57, MP raises to $1.73 (all-in), Hero calls $0.82 (all-in)

Flop is well played. You unblock his Ax and single club hands, not just flushes. Also this sort of opponent might overvalue all kinds of hands. You have equity vs their flushes anyway.

Turn is an snap call, especially for this price vs this player. You're getting almost direct odds to draw vs a flush and they might jam 2 pair, they might overvalue AQ, they might jam QJo with a club, you never know until you see with these players .

You can also consider checking back turn but betting is probably at least as good.

just call flop