Captain has fitting (3)
I believe the answer is:
apt
'fitting' is the definition.
(both mean appropriate)
'captain has' is the wordplay.
'has' says the answer is hidden in the clue.
'APT' is hidden in the letters of 'captain'.
(Other definitions for apt that I've seen before include "Having a tendency" , "Suitable for Pat" , "Tending" , "apartment in Queens, say" , "Ready to learn" .)