J♠T♠ CO vs BB, turn on J♣ 8♦ 5♠ Q♠, 95 bb

Best play: Call

Why

The Q♠ turn brings a second spade and an overcard to your jack on J♣ 8♦ 5♠; it favors the BB's broadways somewhat but also loads you with equity. Your J♠T♠ holds middle pair (a pair of jacks), an open-ended straight draw (T‑J‑Q needing the 9 or K), plus a spade flush draw, so you have a made pair with a mountain of backup outs. Facing the bet, calling is correct: you keep in your dominated bluffs and worse pairs, realize a big draw at a good price in position, and avoid bloating the pot with a hand that is not yet the nuts and folds out little.

Key idea

Middle pair with a straight draw and flush draw is a strong call-down hand in position: realize the draws cheaply rather than raise.

Common mistake

Raising this combo as a bluff: you fold out the hands you dominate and turn a hand with showdown value into a bluff with no need.