Rude Spice's unusual foot treatments (9)
I believe the answer is:
pedicures
'foot treatments' is the definition.
(I've seen this before)
'rude spice's unusual' is the wordplay.
'unusual' indicates anagramming the letters.
'rude'+'spice'='rudespice'
'rudespice' is an anagram of 'PEDICURES'.
(Other definitions for pedicures that I've seen before include "lots of short clips?" , "Foot treatments" .)