Support function working close to Cupid (6)
I believe the answer is:
second
'support' is the definition.
(eg to second an idea is to support it)
'function working close to cupid' is the wordplay.
'function' becomes 'sec' (I can't explain this - if you can you should believe this answer much more).
'working' becomes 'on' (e.g. a machine is working or on).
'close to' says to take the final letters (the close/ending of).
The last letter of 'cupid' is 'd'.
'sec'+'on'+'d'='SECOND'
Can you help me to learn more?
(Other definitions for second that I've seen before include "Short space of time" , "Short time; subordinate" , "Extra" , "additional > support" , "A duellist's or boxer's assistant" .)