French sea song required for commercial (8)
I believe the answer is:
merchant
'commercial' is the definition.
(thesaurus)
'french sea song required' is the wordplay.
'french sea' becomes 'mer' ('sea' in French).
'song' becomes 'chant' (I've seen this before).
'required' says to put letters next to each other.
'mer'+'chant'='MERCHANT'
'for' acts as a link.
(Other definitions for merchant that I've seen before include "Antonio, say" , "One who buys and sells" , "Ten march (anag.)" , "Distributor" , "One involved in wholesale trade" .)