Kids, cold, greeting large doctor in French (8)
I believe the answer is:
children
'kids' is the definition.
(I know this)
'cold greeting large doctor in french' is the wordplay.
'cold' becomes 'C' (eg on taps).
'greeting' becomes 'hi' (hi is a kind of greeting).
'large' becomes 'L' (eg in clothes sizes).
'doctor' becomes 'dr' (abbreviation).
'in french' becomes 'en' ('in' in French).
'c'+'hi'+'l'+'dr'+'en'='CHILDREN'
(Other definitions for children that I've seen before include "Youngsters" , "Sons and daughters" , "Young folk" , "Offspring" , "Minors" .)