He is absorbed in general physics (5)

I believe the answer is:

ralph

'he' is the definition.

'absorbed in general physics' is the wordplay.
'absorbed in' indicates a hidden word.
'RALPH' is hidden within 'general physics'.

'is' acts as a link.

(Other definitions for ralph that I've seen before include "Boy's name" , "man" , "American poet and essayist" , "Chap" , "N Waldo Emerson, nineteenth century US poet" .)

I've seen this clue in The Globe and Mail.

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