Tradesperson alerts rep after restructure (9)
I believe the answer is:
plasterer
'tradesperson' is the definition.
(type of tradesperson)
'alerts rep after restructure' is the wordplay.
'after' says to put letters next to each other.
'restructure' indicates anagramming the letters (I've seen 'restructuring' mean this).
'alerts'+'rep'='alertsrep'
'alertsrep' is an anagram of 'PLASTERER'.
(Other definitions for plasterer that I've seen before include "may get one drunk?" , "Coverer of walls, ceilings, etc" , "One covering walls" , "Tradesman" , "Artisan" .)