Caught a number of dogs (6)
I believe the answer is:
canine
'of dogs' is the definition.
(I've seen this before)
'caught a number' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'number' becomes 'nine' (nine is a kind of number**).
'c'+'a'+'nine'='CANINE'
(Other definitions for canine that I've seen before include "Of or like dogs" , "A tooth; of our best friend" , "Doggy; tooth" , "like a setter" , "Pointed conical tooth" .)