Under pressure, a girl cuts nose badly -- one may be required to operate (7,7)
I believe the answer is:
plastic surgeon
'one may be required to operate' is the definition.
(a plastic surgeon performs surgical operations)
'under pressure a girl cuts nose badly' is the wordplay.
'under' means one lot of letters go next to another.
'pressure' becomes 'p' (abbreviation).
'badly' indicates an anagram.
'a'+'girl'+'cuts'+'nose'='agirlcutsnose'
'agirlcutsnose' anagrammed gives 'lasticsurgeon'.
'p' put next to 'lasticsurgeon' is 'PLASTIC SURGEON'.
(Other definitions for plastic surgeon that I've seen before include "Beautician" , "I rebuild" , "doctor - this one?" .)