Little terror of a cricketer bagging a run (4)
I believe the answer is:
brat
'little terror' is the definition.
('brat' can be a synonym of 'little terror')
'a cricketer bagging a run' is the wordplay.
'a cricketer' becomes 'bat' (I've seen this before).
'bagging' indicates putting letters inside (I've seen this in other clues).
'a run' becomes 'r' (cricket abbreviation).
'bat' enclosing 'r' is 'BRAT'.
'of' acts as a link.
(Other definitions for brat that I've seen before include "Brash young type" , "Little terror" , "Bad child - pack member!" , "Urchin" , "Spoilt kid" .)