Think too much of the bowling speed (8)
I believe the answer is:
overrate
'think too much of' is the definition.
(I've seen this in another clue)
'bowling speed' is the wordplay.
'bowling' becomes 'over' (cricket term).
'speed' becomes 'rate' (the speed at which something happens).
'over'+'rate'='OVERRATE'
'the' is the link.
(Other definitions for overrate that I've seen before include "Think too highly of" , "Think too much of" , "Rank too highly" , "Score excessively" , "Misjudge" .)