Poisonous gas is near to getting dispersed (6)

I believe the answer is:

arsine

'poisonous gas' is the definition.
(I've seen this in another clue)

'is near to getting dispersed' is the wordplay.
'to getting dispersed' indicates anagramming the letters.
'is'+'near'='isnear'
'isnear' with letters rearranged gives 'ARSINE'.

(Another definition for arsine that I've seen is " Poisonous gas".)

I've seen this clue in The Irish Independent.

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