Delighted with chap (3)
I believe the answer is:
eli
'chap' is the definition.
'delighted with' is the wordplay.
'with' indicates a hidden word.
'ELI' can be found hidden inside 'delighted'.
(Other definitions for eli that I've seen before include "Shiloh priest (Bible)" , "Old Testament high priest" , "Biblical teacher of Samuel" , "Highest priest at Shiloh" , "- Whitney invented the cotton gin in seventeen ninety three" .)