Sort of crossing unoccupied zone with female support (5)
I believe the answer is:
zebra
'sort of crossing' is the definition.
'unoccupied zone with female support' is the wordplay.
'unoccupied' suggests removing the centre (remove the inside letters which occupy the word).
'with' means one lot of letters go next to another.
'female support' becomes 'bra' (underwear worn by a woman).
'zone' with its centre removed is 'ze'.
'ze'+'bra'='ZEBRA'
(Other definitions for zebra that I've seen before include "Kind of crossing?" , "Striped member of the horse family" , "Horse-like striped beast" , "Perhaps crossing" , "that's stripy" .)