Ride around working for twister (7)
I believe the answer is:
cyclone
'twister' is the definition.
(thesaurus)
'ride around working' is the wordplay.
'ride' becomes 'cycle' (cycling is a kind of riding**).
'around' means one lot of letters goes inside another.
'working' becomes 'on'.
'cycle' going around 'on' is 'CYCLONE'.
'for' acts as a link.
(Other definitions for cyclone that I've seen before include "Low pressure area or storm" , "Hurricane" , "Wind spiral" , "storm in the West Indies, say" , "Violent whirling wind" .)