Commercial love: bother! (3)
I believe the answer is:
ado
'bother' is the definition.
(I've seen this in another clue)
'commercial love' is the wordplay.
'commercial' becomes 'ad' (abbreviation for advertisement).
'love' becomes 'o' (love means zero in tennis).
'ad'+'o'='ADO'
(Other definitions for ado that I've seen before include "Shakespeare: 'Much ... About Nothing'(3) ()" , "agitation" , "Nothing caused much around 1598" , "stew is provided" , "stir" .)