Add one's name to an advert? (4)
I believe the answer is:
sign
'an advert?' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'add one's name' is the wordplay.
'add one' becomes 'sig' (I can't justify this - if you can you should give a lot more credence to this answer).
'name' becomes 'n' (common abbreviation e.g. on forms).
'sig'+'n'='SIGN'
'to' is the link.
Can you help me to learn more?
(Other definitions for sign that I've seen before include "Indication - put one's name down" , "Omen or indication" , "Communicate to the deaf" , "Put one's name to a document" , "Ram" .)