The last of the staff in a livery (5)
I believe the answer is:
final
'the last' is the definition.
(I've seen this in another clue)
'of the staff in a livery' is the wordplay.
'of' indicates the answer is hidden within the clue.
'FINAL' can be found hidden inside 'the staff in a livery'.
(Other definitions for final that I've seen before include "Concluding" , "Last in a series of games or contests" , "Not to be altered" , "Last, ultimate" , "Last match in a competition" .)