Fellow placing tea on piano (4)
I believe the answer is:
chap
'fellow' is the definition.
(both can mean a man)
'tea on piano' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'piano' becomes 'p' (musical abbreviation).
'cha'+'p'='CHAP'
'placing' is the link.
This may not be correct. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for chap that I've seen before include "Fellow < makes > crack" , "Become sore; fellow" , "Skin crack due to cold - bloke" , "(Of skin) become sore" , "Man; (of skin) turn sore" .)