Counterattack speed has broken a tile (9)
I believe the answer is:
retaliate
'counterattack' is the definition.
(I know that counterattack is a more specific form of retaliate)
'speed has broken a tile' is the wordplay.
'speed' becomes 'rate' (the speed at which something happens).
'has' means one lot of letters goes inside another.
'broken' is an anagram indicator.
'a'+'tile'='atile'
'atile' anagrammed gives 'etali'.
'rate' placed around 'etali' is 'RETALIATE'.
(Other definitions for retaliate that I've seen before include "Repay injury with similar one" , "Hit back" , "Give back blow for blow" , "Strike back, counter" , "Get revenge" .)