Cross about having skill to produce picture? (7)
I believe the answer is:
tableau
'picture?' is the definition.
(a tableau is a picture or display)
'cross about having skill' is the wordplay.
'cross' becomes 'tau cross' (tau cross is a kind of cross).
'about' indicates putting letters inside.
'having skill' becomes 'able' (I've seen this in another clue).
'tau' enclosing 'able' is 'TABLEAU'.
'to produce' is the link.
(Other definitions for tableau that I've seen before include "Dramatic scene - spectacle" , "- - vivant" , "Group of motionless figures -- dramatic scene" , "'Frozen' theatrical scene" , "pictorial presentation" .)