Beam when brat is beaten (1-3)
I believe the answer is:
t-bar
'beam' is the definition.
(I've seen this before)
'brat is beaten' is the wordplay.
'is beaten' indicates anagramming the letters (letters beaten up or destroyed).
'brat' anagrammed gives 'T-BAR'.
'when' is the link.
(Other definitions for t-bar that I've seen before include "that provides lifts?" , "Towing ski lift" , "Type of ski lift" , "Type of ski-lift" , "Type of towing lift for skiers" .)