Mollycoddle firm small group (6)
I believe the answer is:
cosset
'mollycoddle' is the definition.
(I know that mollycoddle can be written as cosset)
'firm small group' is the wordplay.
'firm' becomes 'co' (abbreviation for company).
'small' becomes 's' (abbreviation - e.g. clothes size).
'group' becomes 'set' (both can mean a collection).
'co'+'s'+'set'='COSSET'
(Other definitions for cosset that I've seen before include "Fondle" , "Indulge - pamper" , "Treat with excessive indulgence" , "pet" , "Care for overindulgently" .)