Crossword Genius

Offer alien a bathroom facility (5)

Ross

I believe the answer is:

bidet

'a bathroom facility' is the definition.
(bidet is a bathroom appliance)

'offer alien' is the wordplay.
'offer' becomes 'bid' (synonyms).
'alien' becomes 'et' (extra terrestrial).
'bid'+'et'='BIDET'

(Other definitions for bidet that I've seen before include "Washing facility" , "bathroom cleaner" , "Bathroom feature" , "Bathroom facility" , "Bathroom item" .)

I've seen this clue in The Guardian.
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