Goan dances in Hawaiian skirts that cling (4,2)
I believe the answer is:
hang on
'that cling' is the definition.
(thesaurus)
'goan dances in hawaiian skirts' is the wordplay.
'dances' indicates an anagram.
'in' means one lot of letters goes inside another.
'skirts' suggests removing the centre (retain the edges).
'hawaiian' with its middle taken out is 'hn'.
'goan' is an anagram of 'ango'.
'ango' inserted inside 'hn' is 'HANG ON'.
(Other definitions for hang on that I've seen before include "Don't let go - just a mo'" , "Wait a mo', or hold tightly in suspense" , "Hold tight; wait" , "Don't let go - wait a minute" , "Attend closely to - just a mo' (4,2)" .)