Tweeter reviewed brewed lagers (5,7)
I believe the answer is:
sedge warbler
'tweeter' is the definition.
(bird which tweets)
'reviewed brewed lagers' is the wordplay.
'reviewed' indicates anagramming the letters (To look at again and re view).
'brewed'+'lagers'='brewedlagers'
'brewedlagers' is an anagram of 'SEDGE-WARBLER'.
(Other definitions for sedge warbler that I've seen before include "Common songbird of reed beds" , "Bird of reed beds" .)