Outside broadcast fronted by Frank (4-3)
I believe the answer is:
open-air
'outside' is the definition.
(open air is a kind of outside)
'broadcast fronted by frank' is the wordplay.
I cannot quite understand how this works, but
'broadcast' could be 'air' (to air on TV) and 'air' is present in the answer.
'frank' could be 'open' (synonyms) and 'open' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for open-air that I've seen before include "Taking place outdoors" , "not below roof" , "Outdoor" , "Alfresco" , "Exposed to the elements" .)