Criticism for decent chap leading strike (8)
I believe the answer is:
Here is my best explanation:
'criticism' is the definition.
(brickbat is a kind of criticism)
'decent chap leading strike' is the wordplay.
'decent chap' becomes 'brick' (I've seen this in other clues).
'leading' means one lot of letters go next to another.
'strike' becomes 'bat'.
'for' is the link.
(Other definitions for brickbat that I've seen before include "Hostile criticism - missile", "Critical remark", "Building block used as missile", "Criticism", "(Critic's) weapon", "An uncomplimentary remark, or kind of missile", "Highly critical remark", "Missile, criticism", "Piece of blunt criticism" and "Blunt criticism".)