A fabric in dispute (2,5)

I think it could be either:

Which length description are you looking for?:

2,5

at issue

'in dispute' is the definition.
(synonyms)

'a fabric' is the wordplay.
'fabric' becomes 'tissue' (I have seen 'Thin fabric' mean 'tissue' so perhaps 'fabric' could also mean 'tissue').
'a'+'tissue'='AT ISSUE'

(Other definitions for at issue that I've seen before include "In question, under discussion" , "in dispute" , "Questionable" , "Being discussed or disputed" , "under debate" .)

I've seen this clue in The Telegraph.

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