Ancient Briton embracing student is in bower? (7)

I believe the answer is:

cellist

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'bower?' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'ancient briton embracing student is' is the wordplay.
'ancient briton' becomes 'celt' (I've seen this in another clue).
'embracing' is an insertion indicator.
'student' becomes 'L' (as in L-plates for learner drivers).
'l'+'is'='lis'
'celt' placed around 'lis' is 'CELLIST'.

'in' is the link.

Can you help me to learn more?

(Other definitions for cellist that I've seen before include "String player" , "Du Pre or Lloyd Weber" , "E.g. Casals, du Pre" , "Lloyd Webber?" , "Musician in string section" .)

I've seen this clue in The Telegraph.

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