Useless to go back in the freeze, so I took a break (6)
I believe the answer is:
otiose
'useless' is the definition.
(synonyms)
'go back in the freeze so i took a break' is the wordplay.
'go back' shows that the letters should be reversed in order.
'in' indicates a hidden word.
'esoito' is hidden in the letters of 'freeze so i took break'.
'esoito' backwards is 'OTIOSE'.
'to' acts as a link.
(Other definitions for otiose that I've seen before include "Indolent or superfluous" , "O so tie up and be vain and empty" , "Serving no useful purpose" , "Devoid of worth or significance" , "Idle, empty" .)