Begin to drive dangerously? (9)
I believe the answer is:
undertake
I believe this is a double definition.
'begin' is the first definition.
(thesaurus)
'drive dangerously?' is the second definition.
(I've seen this before)
'to' acts as a link.
(Other definitions for undertake that I've seen before include "dangerous driving manoeuvre?" , "Try" , "Commit to (an action)" , "drive dangerously?" , "what indisciplined motorway driver might do?" .)