Reports it's very warm on board (5)
I believe the answer is:
shots
'reports' is the definition.
The answer and definition can be both related to communication as well as being plural nouns.
Perhaps there's a link between them I don't understand?
'very warm on board' is the wordplay.
I cannot really see how this works, but
'warm' could be 'hot' (associated in meaning) and 'hot' is found within the answer.
'on board' could be 'ss' (I've seen this in other clues) and 'ss' is found in the leftover letters.
No letters remain.
This explanation may well be incorrect...
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for shots that I've seen before include "Gunfire -- attempts" , "See 2" .)