See fit to send a message (5)
I believe the answer is:
cable
'send a message' is the definition.
'cable' can be an answer for 'send' (send a message by cable). I'm not sure about the 'a message' bit.
'see fit' is the wordplay.
'see' becomes 'C' (the word for the letter, according to Chambers).
'fit' becomes 'able' (similar in meaning).
'c'+'able'='CABLE'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for cable that I've seen before include "Communication - wire - 200 yards in length" , "Telegram; thick rope" , "Naut. length; transmit" , "Strong line" , "Strong rope made of twisted strands of hemp, nylon or steel wire" .)