Tricky JT hand ITM

20+2$ on stars 12 people left. 18 places paid.
PokerStars Game #3049187186: Tournament #15061326, Hold'em No Limit - Level XII (800/1600) - 2005/11/13 - 14:55:32 (ET)
Table '15061326 2' Seat #4 is the button
Seat 2: cartbag4 (39584 in chips)
Seat 3: justcomin (17635 in chips)
Seat 4: ignored (19123 in chips)
Seat 5: Vinder100 (42060 in chips)
Seat 8: ammed (7671 in chips)
Seat 9: WEASELINI (29347 in chips)
cartbag4: posts the ante 75
justcomin: posts the ante 75
ignored: posts the ante 75
Vinder100: posts the ante 75
ammed: posts the ante 75
WEASELINI: posts the ante 75
Vinder100: posts small blind 800
ammed: posts big blind 1600
*** HOLE CARDS ***
Dealt to ignored [J[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/club.gif[/img]]
WEASELINI: folds
cartbag4: folds
justcomin: folds
ignored: calls 1600
Vinder100: calls 800
ammed: checks
*** FLOP *** [J[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/club.gif[/img]]
Vinder100: checks
ammed: checks
ignored: bets 5000
Vinder100: raises 17400 to 22400

I think he is on a bluff here. Would he really slowplay a monster here with two clubs on board?
Can we face KJ,AJ?
What would you do no reads except for stack size.