Crossword Genius

Behold employment for parasite (5)

Ross

I believe the answer is:

louse

'parasite' is the definition.
(type of parasitic insect)

'behold employment' is the wordplay.
'behold' becomes 'lo' (archaic exclamation meaning 'look!').
'employment' becomes 'use' (how something is used).
'lo'+'use'='LOUSE'

'for' acts as a link.

(Other definitions for louse that I've seen before include "Bloodsucking parasitic insect" , "Unpleasant person" , "Despicable type (of insect?)" , "Human parasite" , "Mean person" .)

I've seen this clue in The Mirror.
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