Crossword Genius

Small prune that’s fed to pigs (4)

Ross

I believe the answer is:

slop

'that's fed to pigs' is the definition.
(liquid fed to animals)

'small prune' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'prune' becomes 'lop' (synonyms).
's'+'lop'='SLOP'

(Other definitions for slop that I've seen before include "(Of liquid) spill over" , "Cause to spill over" , "Splash" , "Liquid refuse, swill" , "Spilled liquid" .)

I've seen this clue in The Times.
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