Art on an arm, for short (3)
I believe the answer is:
tat
'art on an arm for short' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tat that I've seen before include "Cheap rubbish" , "Tawdry stuff" , "Junk; make lace" , "trashy clothing" , "Tawdry things" .)