Barbie takes old papa a perfect amount of cream (6)
I believe the answer is:
dollop
'a perfect amount of cream' is the definition.
I can't judge whether this definition defines the answer.
'barbie takes old papa' is the wordplay.
'barbie' becomes 'doll' (I've seen this in another clue).
'takes' means one lot of letters go next to another.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'papa' becomes 'P' (phonetic alphabet: alpha, bravo, charlie etc.).
'doll'+'o'+'p'='DOLLOP'
Can you help me to learn more?
(Other definitions for dollop that I've seen before include "Blob" , "Semisolid lump" , "Small mass of eg cream" , "Shapeless mass of soft food" , "Small shapeless mass" .)