Illustrate in rude pictures (6)
I believe the answer is:
depict
'illustrate' is the definition.
(I've seen this in another clue)
'in rude pictures' is the wordplay.
'in' indicates a hidden word.
'DEPICT' is hidden within 'rude pictures'.
(Other definitions for depict that I've seen before include "Show[S]" , "Show, illustrate" , "Paint" , "'Show, portray (6)'" , "Delineate" .)