Crossword Genius

Is a glue not unusually viscous? (10)

Ross

I believe the answer is:

gelatinous

'viscous?' is the definition.
(thesaurus)

'is a glue not unusually' is the wordplay.
'unusually' is an anagram indicator.
'is'+'a'+'glue'+'not'='isagluenot'
'isagluenot' anagrammed gives 'GELATINOUS'.

(Other definitions for gelatinous that I've seen before include "Of a jelly-like consistency" , "description of size" .)

I've seen this clue in The Independent.
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