Do they speak your name on the telephone? (7)
I believe the answer is:
Here is my best explanation:
'do they speak your' is the definition.
The definition suggests an adverb but the answer is not.
'name on the telephone?' is the wordplay.
'name' becomes 'ers' (I can't explain this - if you can you should give a lot more credence to this answer).
'on' says to put letters next to each other.
'the telephone?' becomes 'call' (call is a kind of telephone).
'ers' after 'call' is 'CALLERS'.