Understands it's stated patient individual requires cosmetic surgery (4,3)
I believe the answer is:
nose job
'cosmetic surgery' is the definition.
(nose job is a type of cosmetic surgery operation)
'understands it's stated patient individual' is the wordplay.
'understands' becomes 'knows' (understand can mean to know or recognise).
'it's stated' indicates a 'sounds like' (homophone) clue (as it might sound when said aloud or stated).
'patient individual' becomes 'Job' (the biblical figure Job was very patient).
'knows' sounds like 'nose'.
'nose'+'job'='NOSE JOB'
'requires' is the link.
(Other definitions for nose job that I've seen before include "Piece of plastic surgery" , "Rhinoplasty" , "Unfortunately" , "Schnozzle surgery" , "Surgery of the face" .)