Let's test this on a full deal. You hold: 

 65  
 AJ1095  
 K82  
 AQ9
 

The auction goes:

West (YOU)	North	East	South
			1
2	2	Pass	4
All Pass

 

 

 

 

 

 

Pretty standard auction. This isn't my favorite suit for a 2-level overcall, but the overall hand strength and vulnerability justify it. First question: what do you lead?

Don't be aggressive here. Partner isn't likely to have much. When you have most of the points for your side, it's best to go passive (unless you can set something up). Here, the only passive option is a spade. It's possible you might reveal the trump holding, but it sounds like declarer has the trump suit pretty well covered--everything else is more dangerous. You lead a spade (which one doesn't matter for us). 

 

Vul:NS Dlr: S	DUMMY  J43  K62  A1043  J87
65  AJ1095  K82  AQ9

 

 

 

 

 

 

 

 

Declarer wins with the Q in their hand and plays the K and a third spade to dummy, partner following with the 2, 9, and 10). You pitch the 5 for lack of a better idea (partner isn't going to think you hate hearts, and you can't risk the 9 in unlikely event that declarer holds 4 hearts). 

Declarer now plays the 2 from dummy and partner plays the 8, declarer the Q

The full deal:

Vul:NS Dlr: S	J43  K62  A1043  J87
65  AJ1095  K82  AQ9		1092  8743  J95  1043
	AKQ87  Q  Q76  K652