Some into oblivion also (3)

I believe the answer is:

too

'also' is the definition.
(synonyms)

'some into oblivion' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'TOO' can be found hidden inside 'into oblivion'.

(Other definitions for too that I've seen before include "Furthermore" , "As well, also" , "Additionally" , "Also; overly" , "To a greater than desirable extent" .)

I've seen this clue in The Sun.

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