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 subsidiary indication.
'decent chap' becomes 'brick' (I've seen this in other clues).
'leading' says to put letters next to each other.
'strike' becomes 'bat'.
'for' is the link.
(Other definitions for brickbat that I've seen before include "Building block used as missile", "Critical remark", "Missile, criticism", "An uncomplimentary remark, or kind of missile", "Hostile criticism - missile", "(Critic's) weapon", "Highly critical remark", "Piece of blunt criticism" and "Blunt criticism".)