Fine tunes in broadcast most strange (8)
I believe the answer is:
funniest
'most strange' is the definition.
('funny' can be a synonym of 'strange')
'fine tunes in broadcast' is the wordplay.
'fine' becomes 'f' (abbreviation).
'broadcast' indicates an anagram (letters scattered or cast around).
'tunes'+'in'='tunesin'
'tunesin' is an anagram of 'unniest'.
'f'+'unniest'='FUNNIEST'
(Other definitions for funniest that I've seen before include "Most comical" , "Most amusing" , "Most hilarious" .)