Buy tea to be brewed for stunner (6)
I believe the answer is:
beauty
'stunner' is the definition.
(synonyms)
'buy tea to be brewed' is the wordplay.
'to be brewed' indicates an anagram (I've seen 'being brewed' mean this).
'buy'+'tea'='buytea'
'buytea' anagrammed gives 'BEAUTY'.
'for' is the link.
(Other definitions for beauty that I've seen before include "Very fine specimen" , "it delights the senses" , "sometimes put before queen?" , "Aesthetically pleasing quality" , "very attractive lady" .)