Go in chippy, wanting fish (5)
I believe the answer is:
enter
'go in' is the definition.
(synonyms)
'chippy wanting fish' is the wordplay.
'chippy' becomes 'carpenter' (informal term for a carpenter).
'wanting' indicates named letters should be taken away (to want something can mean to lack it or need it).
'fish' becomes 'carp' (carp is a kind of fish).
'carpenter' with 'carp' taken out is 'ENTER'.
(Other definitions for enter that I've seen before include "Go in - set down" , "Take part in a contest" , "Record (in a log)" , "cross the threshold" , "Fruit drink" .)