Linguist in college once moved across lake (8)

I believe the answer is:

polyglot

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'linguist' is the definition.
('polyglot' can be a synonym of 'linguist')

'college once moved across lake' is the wordplay.
'college' becomes 'poly' (polytechnic).
'once moved' becomes 'got' (I can't explain this - if you can you should believe this answer much more).
'across' indicates putting letters inside.
'lake' becomes 'l'.
'got' placed around 'l' is 'glot'.
'poly'+'glot'='POLYGLOT'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for polyglot that I've seen before include "Having say French and Italian" , "Linguist" , "One speaks several languages" , "Bible" , "Using several languages" .)

I've seen this clue in The Telegraph.

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