A broadcast from somewhere off the ship's side (5)
I believe the answer is:
abeam
'somewhere off the ship's side' is the definition.
I can't tell whether this defines the answer.
'a broadcast' is the wordplay.
'broadcast' becomes 'beam' (beam can mean to broadcast or transmit).
'a'+'beam'='ABEAM'
'from' is the link.
Can you help me to learn more?
(Other definitions for abeam that I've seen before include "Position relative to ship" , "at right angles to vessel" , "At right angles to the side of a ship" , "going from one side to the other" , "In a line at right angles to a vessel's length" .)