Change, say, with love for intimate friend (5,3)
I believe the answer is:
alter ego
'intimate friend' is the definition.
'alter ego' can be an answer for 'friend' (alter ego is a kind of friend). I am not sure about the 'intimate' bit.
'change say with love' is the wordplay.
'change' becomes 'alter' (altering is a kind of changing).
'say' becomes 'eg' (both can mean for example).
'with' says to put letters next to each other.
'love' becomes 'o' (love means zero in tennis).
'alter'+'eg'+'o'='ALTER EGO'
'for' is the link.
Can you help me to learn more?
(Other definitions for alter ego that I've seen before include "Trusted friend" , "One's secondary personality" , "To regale other self" , "Go, relate to other self" , "A person's secondary personality" .)