Crossword Genius

Untidy, a flat can be deadly! (5)

Ross

I believe the answer is:

fatal

'be deadly' is the definition.
(similar in meaning)

'untidy a flat' is the wordplay.
'untidy' indicates anagramming the letters.
'a'+'flat'='aflat'
'aflat' is an anagram of 'FATAL'.

'can' is the link.

(Other definitions for fatal that I've seen before include "Unavoidable" , "Leading to disaster" , "Causing death, say accident" , "Bringing death" , "Resulting in disaster or death" .)

I've seen this clue in the Evening Standard.
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