Crossword Genius

Farm animal requires long rearing (7)

Ross

I believe the answer is:

rampant

'rearing' is the definition.
('rampant' can be a synonym of 'rearing')

'farm animal requires long' is the wordplay.
'farm animal' becomes 'ram' (I've seen this before).
'requires' is a charade indicator (letters next to each other).
'long' becomes 'pant' (I've seen this before).
'ram'+'pant'='RAMPANT'

(Other definitions for rampant that I've seen before include "Out of control" , "Uncontrolled" , "Spreading like wildfire" , "running wild" , "Unchecked - standing up on hind legs" .)

I've seen this clue in The Independent.
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