I accepted having to follow sea channels (5)
I believe the answer is:
media
'channels' is the definition.
(I have seen 'Channels of communication ' mean 'media' so perhaps 'channels' could also mean 'media')
'i accepted having to follow sea' is the wordplay.
'i' becomes 'me'.
'accepted' becomes 'a' (financial abbreviation).
'having' is an insertion indicator.
'to follow sea' becomes 'di' (I can't explain this - if you can you should believe this answer much more).
'me'+'a'='mea'
'mea' going around 'di' is 'MEDIA'.
Can you help me to learn more?
(Other definitions for media that I've seen before include "News outlets" , "Press, TV etc" , "Aimed (anag.)" , "Newspapers, TV, radio etc" , "The 14, for example" .)