Everything in this garbled version is rather far-fetched (7)

I believe the answer is:

tallish

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'everything in this garbled version is rather far-fetched' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs can sometimes define each other.

'everything in this garbled' is the wordplay.
'everything' becomes 'all' (I've seen this before).
'in' indicates putting letters inside.
'garbled' indicates anagramming the letters.
'this' is an anagram of 'tish'.
'all' placed within 'tish' is 'TALLISH'.

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(Other definitions for tallish that I've seen before include "Rather lofty" , "rather large" , "Consider" .)

I've seen this clue in the Evening Standard.

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