Faulty satnav restricted parcel courier (5)
I believe the answer is:
santa
'parcel courier' is the definition.
'faulty satnav restricted' is the wordplay.
'faulty' indicates an anagram.
'restricted' means to remove the last letter (restricted can mean limited or reduced).
'satnav' with its final letter removed is 'satna'.
'satna' with letters rearranged gives 'SANTA'.
(Other definitions for santa that I've seen before include "Saint Nicholas" , "Present bringer" , "& 22 Father Christmas" , "bringer of gifts" , "A children's favourite may" .)