Stick label back on (5)
I believe the answer is:
baton
'stick' is the definition.
(thesaurus)
'label back on' is the wordplay.
'label' becomes 'tab' (I've seen this before).
'back' is a reversal indicator.
'tab' back-to-front is 'bat'.
'bat'+'on'='BATON'
(Other definitions for baton that I've seen before include "Stick passed in relay races" , "Controller of players" , "one watched by players" , "Relay runner's stick" , "Piece of equipment" .)