Understand about old daughter following guardian (9)
I believe the answer is:
godfather
'guardian' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?
'understand about old daughter following' is the wordplay.
'understand' becomes 'gather' (synonyms).
'about' means one lot of letters goes inside another.
'old daughter following' becomes 'odf' (this might be a standard abbreviation which I don't know about).
'gather' enclosing 'odf' is 'GODFATHER'.
Can you help me to learn more?
(Other definitions for godfather that I've seen before include "gang boss" , "Baptismal sponsor" , "Mafia boss" , "leading exponent" , "Mafia head" .)