Criminal pinching a chap’s drawing implement (6)
I believe the answer is:
crayon
'drawing implement' is the definition.
(crayons are used for drawing)
'criminal pinching a chap's' is the wordplay.
'criminal' becomes 'con' (abbreviation for 'convict').
'pinching' indicates putting letters inside (taking inside).
'a chap' becomes 'ray' (man's name).
'con' going around 'ray' is 'CRAYON'.
(Other definitions for crayon that I've seen before include "One colours with this" , "Colouring pencil" , "Drawing-stick" , "Drawing pen" , "Child's colouring stick" .)