Short Peter Sellers piece (5)
I believe the answer is:
terse
'short' is the definition.
('terse' can be a synonym of 'short')
'peter sellers piece' is the wordplay.
'piece' indicates a hidden word.
'TERSE' is hidden in the letters of 'peter sellers'.
(Other definitions for terse that I've seen before include "Pithy among trees" , "precise" , "Curt - abrupt" , "Brief and to the point" , "Short, abrupt" .)