Surgical procedure means life and beginnings of prodigious sex — yes! (6)
I believe the answer is:
biopsy
'surgical procedure' is the definition.
(removal of tissue from the body)
'life and beginnings of prodigious sex yes' is the wordplay.
'life' becomes 'bio' (life can mean a biography).
'and' means one lot of letters go next to another.
'beginnings of' suggests taking the first letters.
The initial letters of 'prodigious sex yes' is 'psy'.
'bio'+'psy'='BIOPSY'
'means' acts as a link.
(Other definitions for biopsy that I've seen before include "Examination of tissues cut from living body" , "Examination of tissues or liquids from a living body" , "Diagnostic tissue examination" , "Examination of bodily tissue" , "Examination of tissue to determine the existence of disease" .)