Some uncouth robbers getting beat (5)
I believe the answer is:
throb
'beat' is the definition.
(throb is a kind of beat)
'some uncouth robbers getting' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'THROB' is hidden in the letters of 'uncouth robbers getting'.
(Other definitions for throb that I've seen before include "Drum" , "Vibrate with rhythm like heart" , "beat repeatedly" , "Have strong or irregular heartbeat" , "One's heart may do it" .)