Yearn to have a drink and fade away (3,4)
I believe the answer is:
die down
'fade away' is the definition.
'die down' can be an answer for 'fade' (I've seen this before). I am not certain of the 'away' bit.
'yearn to have a drink' is the wordplay.
'yearn' becomes 'die' (dying is a kind of yearning).
'to have' means one lot of letters go next to another.
'a drink' becomes 'down' (to down something can mean to drink it quickly).
'die'+'down'='DIE DOWN'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for die down that I've seen before include "Subside" , "fade" , "Become less loud" , "become quieter" , "Quieten" .)