Rugby player briefly put on weight to make line-up (9)
I believe the answer is:
programme
'make line-up' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'rugby player briefly put on weight' is the wordplay.
'rugby player' becomes 'prop' (type of rugby player).
'briefly' means to remove the last letter.
'put on' means one lot of letters go next to another (some letters go on or after others).
'weight' becomes 'gramme' (I have seen 'Small weight ' mean 'gramme' so perhaps 'weight' could also mean 'gramme').
'prop' with its last letter taken away is 'pro'.
'pro'+'gramme'='PROGRAMME'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for programme that I've seen before include "Broadcast feature" , "Radio or television show" , "List of events" , "Syllabus" , "Menu of events" .)