In Tokyo? Delvene to do some fluctuating oral work? (5)
I believe the answer is:
yodel
'do some fluctuating oral work?' 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?
'in tokyo? delvene to' is the wordplay.
'in' says the answer is hidden in the clue.
'YODEL' is hidden in the letters of 'tokyo delvene to'.
Can you help me to learn more?
(Other definitions for yodel that I've seen before include "Alpine song or call" , "Sing warblingly" , "Sing like the Lonely Goatherd?" , "Sing in traditional Swiss manner" , "Alpine mountain call" .)