Fuss caused by commercial ring (3)
I believe the answer is:
ado
'fuss' is the definition.
(synonyms)
'commercial ring' is the wordplay.
'commercial' becomes 'ad' (abbreviation for advertisement).
'ring' becomes 'O' (letter resembling a ring).
'ad'+'o'='ADO'
'caused by' is the link.
(Other definitions for ado that I've seen before include "Rapid bustling commotion" , "flapping" , "puff ball!" , "hoo-hah" , "Flurry" .)