Thinks rising tide came between friends (9)
I believe the answer is:
meditates
'thinks' is the definition.
(meditating is a kind of thinking)
'rising tide came between friends' is the wordplay.
I cannot quite see how this works, but
an anagram of 'tide' is 'edit' which is located in the answer.
'friends' could be 'mates' (mate is a kind of friend) and 'mates' is found in the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for meditates that I've seen is " Thinks".)