Trades I've arranged to publicise (9)
I believe the answer is:
advertise
'to publicise' is the definition.
(synonyms)
'trades i've arranged' is the wordplay.
'arranged' indicates an anagram (letters rearranged).
'trades'+'ive'='tradesive'
'tradesive' anagrammed gives 'ADVERTISE'.
(Other definitions for advertise that I've seen before include "Publicise, promote" , "Make public what is for sale" , "Call public attention to" , "Praise - plug" , "Draw attention to, goods for sale perhaps" .)