Crossword Genius

Canoe bobbing on this? (5)

Ross

I believe the answer is:

ocean

'this?' is the definition.
The definition suggests a singular noun which matches the answer.

'canoe bobbing' is the wordplay.
'canoe' anagrams to 'OCEAN'.
However, I am not sure how the anagram is indicated.

'on' acts as a link.

(Other definitions for ocean that I've seen before include "Large body of salt water" , "A lot of water!" , "Great sea" , "Huge sea" , "Very large area of sea" .)

I've seen this clue in The Times.
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