This deal was (mis)played in the 2017 Team Trials by a former world champion. Try your luck with his South cards:

AK86
J52
--
AKJ1052

At unfavorable vulnerability, he opened the bidding 1 in second seat. LHO overcalled 1 and partner made a negative double (promising both majors). RHO made a constructive diamond raise and opener jumped to 4. Everyone passed and the A was led:

Q1072 Q764 K102 43

AK86 J52 -- AKJ1052

The A was led, ruffed by declarer. He played the AK (all following) and then a spade to the queen (RHO throwing a diamond). Now what?

A club was led to the jack and the finesse won. If you try the A next, you are down. Here is the Real deal:

Vul:North-South Dlr: East	Q1072 Q764 K102 43
543 K1098 AQ985 8		J9 A3 J7643 Q976
	AK86 J52 -- AKJ1052

After the A ruffed, declarer drew trumps. When a club to the jack held and the A revealed the 4-1 break, there was no recovery. Remember that declarer ruffed at trick one, so he was out of trumps.

The winning solution was unusual. After the J won, there was a 100% way to make the contract (assuming LHO didn't sneakily duck the offside Q). Declarer is left in this position:

Vul:North-South Dlr: East	10 Q764 K10 4
-- K1098 Q985		-- A3 J76 Q97
	-- J52 -- AK1052

Declarer wants to take another club finesse, but is stuck in hand. Laying down the A (as we've seen) fails if clubs are 4-1. Leading hearts could lead to the loss of 4 hearts tricks, but not if done properly. Leading a low heart to the queen and East's ace costs the loss of 4 heart tricks (East wins the ace and returns a heart). The sure way not to lose 4 heart tricks is, in the diagrammed position, to play a low heart from both hands (the J also will do, but it isn't as obvious). Whatever the opponents do (even if they can take 3 heart tricks), they then have to give you access to a repeat club finesse and 10 tricks. On the actual layout, you'd end up with 11.