Tea-time's break for judge (8)
I believe the answer is:
estimate
'for judge' is the definition.
(synonyms)
'tea-time's break' is the wordplay.
'break' indicates anagramming the letters.
'tea'+'times'='teatimes'
'teatimes' is an anagram of 'ESTIMATE'.
(Other definitions for estimate that I've seen before include "Assess value" , "Believe" , "Calculate in approximate way" , "Guess, rough calculation" , "Tease Tim (anag.)" .)