Sounds like correct way to use pen (5)
I believe the answer is:
write
'pen' is the definition.
(I know that pen can be written as write)
'sounds like correct' is the wordplay.
'sounds like' shows a homophone (sound like).
'correct' becomes 'right' (right can mean correct).
'right' is a homophone of 'WRITE'.
'way to use' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for write that I've seen before include "Produce text" , "Draft" , "Use a pen/pencil" , "Put pen to paper" , "Compose (music)" .)