Ask him for some good advice (3)
I believe the answer is:
dad
'ask him' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'some good advice' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'DAD' can be found hidden inside 'good advice'.
'for' is the link.
Can you help me to learn more?
(Other definitions for dad that I've seen before include "Papa" , "Relation" , "Old man" , "Pop, pater" , "Popular and informal father" .)