Crossword Genius

This chemical could be deadly, eh? (8)

Ross

I believe the answer is:

aldehyde

'this chemical' is the definition.

'could be deadly eh?' is the wordplay.
'could be' indicates an anagram.
'deadly'+'eh'='deadlyeh'
'deadlyeh' is an anagram of 'ALDEHYDE'.

(Other definitions for aldehyde that I've seen before include "chemical" , "Organic compound" .)

I've seen this clue in The Telegraph.
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