Going around in the nip, openly intimate (5)
I believe the answer is:
opine
'intimate' is the definition.
(intimate can mean to give an opinion)
'going around in the nip openly' is the wordplay.
'going around' shows that the letters should be reversed in order.
'in' indicates a hidden word.
'enipo' is hidden in the letters of 'the nip openly'.
'enipo' backwards is 'OPINE'.
(Other definitions for opine that I've seen before include "Suggest" , "State one's held view" , "Say what one thinks" , "Hold forth" , "judge" .)