Caveat broadcast before Democrat quit (7)
I believe the answer is:
vacated
'quit' is the definition.
The answer and definition are not the same part of speech. However, past participle verbs and adjectives occasionally mean the same thing.
'caveat broadcast before democrat' is the wordplay.
'broadcast' is an anagram indicator (letters scattered or cast around).
'before' means one lot of letters go next to another.
'democrat' becomes 'd'.
'caveat' anagrammed gives 'vacate'.
'vacate'+'d'='VACATED'
Can you help me to learn more?
(Another definition for vacated that I've seen is " Quitted".)