Crossword Genius

Phone driver about something highly toxic (6,5)

Ross

I believe the answer is:

horned viper

'something highly toxic' is the definition.
(venomous snake)

'phone driver about' is the wordplay.
'about' is an anagram indicator.
'phone'+'driver'='phonedriver'
'phonedriver' is an anagram of 'HORNED VIPER'.

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