Popular commercial with gent missing good chance? (11)
I believe the answer is:
inadvertent
'chance?' is the definition.
(thesaurus)
'popular commercial with gent missing good' is the wordplay.
'popular' becomes 'in'.
'commercial' becomes 'advert' (I've seen this before**).
'with' is a charade indicator (letters next to each other).
'missing' is a deletion indicator.
'good' becomes 'g' (abbreviation).
'gent' with 'g' taken away is 'ent'.
'in'+'advert'+'ent'='INADVERTENT'
(Other definitions for inadvertent that I've seen before include "Careless" , "Accidental" , "without meaning" , "unguarded" , "Unintentional" .)