Argue about contents of crisp array (4)
I believe the answer is:
spar
'argue' is the definition.
(sparring is a kind of arguing)
'contents of crisp array' is the wordplay.
'contents of' indicates a hidden word.
'SPAR' can be found hidden inside 'crisp array'.
'about' is the link.
(Other definitions for spar that I've seen before include "Box without punching hard" , "Act as boxer" , "Box (lightly) - fight (verbally)" , "Mineral; box; wing beam" , "possibly rigged" .)