Cow, bovine possibly? (5)

I believe the answer is:

bully

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'cow' is the definition.
(both can mean to intimidate someone)

'bovine possibly?' is the wordplay.
'bovine' becomes 'bull' (bull is a kind of bovine).
'possibly?' becomes 'y' (I can't justify this - if you can you should believe this answer much more).
'bull'+'y'='BULLY'

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(Other definitions for bully that I've seen before include "Beef cured or pickled in brine" , "Intimidating person" , "Intimidate" , "Tinned beef" , "Playground thug" .)

I've seen this clue in The Telegraph.

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