Bachelor, far from prudent and impetuous (5)
I believe the answer is:
brash
'impetuous' is the definition.
(I've seen this in another clue)
'bachelor far from prudent' is the wordplay.
'bachelor' becomes 'B' (abbreviation e.g. BA=Bachelor of Arts).
'far from prudent' becomes 'rash' (I've seen this in another clue).
'b'+'rash'='BRASH'
'and' acts as a link.
(Other definitions for brash that I've seen before include "Foolhardy" , "Tasteless in appearance" , "Unable to hear" , "Vulgarly self-assertive, impudent" , "Cocky and tactless" .)