American politician introduced to a baby (6)
I believe the answer is:
pamper
'baby' is the definition.
(I know that baby can be written as pamper)
'american politician introduced to a' is the wordplay.
'american' becomes 'a' (common abbreviation - e.g. in organisation names).
'politician' becomes 'MP' (Member of Parliament).
'introduced to' indicates putting letters inside.
'a' becomes 'per' (eg 'one a day' means 'one per day').
'a'+'mp'='amp'
'amp' put within 'per' is 'PAMPER'.
(Other definitions for pamper that I've seen before include "Treat indulgently" , "Mollycoddle" , "Treat with over-indulgence" , "'Indulge, spoil (6)'" , "Overindulge (someone)" .)