One that eats fish of higher temperature in Bow (5)

I believe the answer is:

otter

I'm a little stuck... Click here to teach me more about this clue!

'one that eats fish' is the definition.
(I've seen this before)

'of higher temperature in bow' is the wordplay.
'of' becomes 'o''.
'higher' suggests taking the first letters (I've seen 'highest of' mean this (top letter - down clues only)).
'in bow' becomes 'ter' (I am not sure about this - if you are sure you should believe this answer much more).
The first letter of 'temperature' is 't'.
'o'+'t'+'ter'='OTTER'

Can you help me to learn more?

(Other definitions for otter that I've seen before include "Semi-aquatic mammal" , "Playful aquatic animal of 'Tarka' fame" , "Tarka, for one" , "bad-tempered little beast" , "furry animal" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app