KrisKross, with a pistol, climbing into luxury car? Strange! (9)
I believe the answer is:
irregular
'strange' is the definition.
(thesaurus)
'kriskross with a pistol climbing into' is the wordplay.
'kriskross' becomes 'irr' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'with' says to put letters next to each other.
'pistol' becomes 'luger' (I have seen 'German pistol' mean 'luger' so perhaps 'pistol' could also mean 'luger').
'climbing' is a reversal indicator (in a down clue, letters climb up).
'into' is an insertion indicator.
'a' next to 'luger' is 'aluger'.
'aluger' reversed gives 'regula'.
'irr' placed around 'regula' is 'IRREGULAR'.
'luxury car?' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for irregular that I've seen before include "Lacking continuity or contrary to the rule" , "somewhat odd" , "Erratic" , "Haphazard" , "Out of the ordinary" .)