Spinster's former hotel employee (3,4)
I believe the answer is:
old maid
'spinster's' is the definition.
(synonyms)
'former hotel employee' is the wordplay.
'former' becomes 'old' (both can mean previous).
'hotel employee' becomes 'maid' (I've seen this in another clue).
'old'+'maid'='OLD MAID'
(Other definitions for old maid that I've seen before include "Pejorative term for elderly unmarried woman" , "Spinster - card game" , "Singleton" , "never taken from the shelf?" , "Miss" .)