Unceremonious over leaving playing area (4)
I believe the answer is:
curt
'unceremonious' is the definition.
(I've seen this before)
'over leaving playing area' is the wordplay.
'over' becomes 'o' (cricket abbreviation).
'leaving' indicates named letters should be taken away.
'playing area' becomes 'court' (court is a kind of playing area).
'court' with 'o' taken away is 'CURT'.
(Other definitions for curt that I've seen before include "Brusque, abrupt in speech" , "Brief and brusque" , "Shrub with bright autumn colours" , "Brusquely succinct" , "Brusque, short" .)