Lead meeting carbon on mop (5)
I believe the answer is:
chair
'lead' is the definition.
(I know that lead can be written as chair)
'meeting carbon on mop' is the wordplay.
'meeting' is a charade indicator (letters next to each other).
'carbon' becomes 'C' (chemical symbol).
'on mop' becomes 'hair' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'c'+'hair' is 'CHAIR'.
Can you help me to learn more?
(Other definitions for chair that I've seen before include "Top seat of committee" , "director at meeting" , "Windsor, for example" , "Academic position" , "Get seat" .)