Bit of American broadcast overheard (4)
I believe the answer is:
cent
'bit of american' is the definition.
'cent' can be an answer for 'bit' (thesaurus). I'm unsure of the 'of american' bit.
'broadcast overheard' is the wordplay.
'broadcast' becomes 'sent' (sent or transmitted as a broadcast).
'overheard' indicates a 'sounds like' (homophone) clue.
'sent' sounds like 'CENT'.
Can you help me to learn more?
(Other definitions for cent that I've seen before include "Small monetary unit" , "Tiny coin" , "change from Colorado!" , "Little bit of money" , "One-hundreth part of a currency" .)