Promising crisp commercial due to collect Oscar (13)
I believe the answer is:
foreshadowing
'promising' is the definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I can't see?
'crisp commercial due to collect oscar' is the wordplay.
'crisp' becomes 'fresh' (similar in meaning).
'commercial' becomes 'ad' (abbreviation for advertisement).
'due to' becomes 'owing' (owing money).
'collect' is an insertion indicator.
'oscar' becomes 'O' (phonetic alphabet: alpha, bravo, charlie etc.).
'fresh'+'ad'+'owing'='freshadowing'
'freshadowing' placed around 'o' is 'FORESHADOWING'.
Can you help me to learn more?
(Another definition for foreshadowing that I've seen is " Being an indication (of something to follow)".)