Beat broth that has been cooked (5)
I believe the answer is:
throb
'beat' is the definition.
(throb is a kind of beat)
'broth that has been cooked' is the wordplay.
'that has been cooked' indicates an anagram.
'broth' is an anagram of 'THROB'.
(Other definitions for throb that I've seen before include "Sound of engines" , "beat repeatedly" , "Beat strongly" , "Strong regular beat" , "Beat quickly from excitement etc" .)