Ocean’s the end of Tom Bowling (4)
I believe the answer is:
seam
'bowling' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'ocean's the end of tom' is the wordplay.
'ocean' becomes 'sea' (synonyms).
'the end of' indicates one should take the final letters.
The last letter of 'tom' is 'm'.
'sea'+'m'='SEAM'
Can you help me to learn more?
(Other definitions for seam that I've seen before include "Unfasten" , "Join in material - layer of coal" , "Join round cricket ball" , "Sewing join" , "Joint between two edges" .)