Boy Lisa bowled over (5)
I believe the answer is:
basil
'boy' is the definition.
(I've seen this before)
'lisa bowled over' is the wordplay.
'bowled' becomes 'b' (cricket abbreviation).
'over' is a reversal indicator.
'lisa'+'b'='lisab'
'lisab' back-to-front is 'BASIL'.
(Other definitions for basil that I've seen before include "Culinary plant" , "Name of male" , "Plant; Brush; Fawlty" , "Seasoning" , "Aromatic herb with purplish-green leaves" .)