Stop stirring ale into beverage, hopelessly out of fashion (5,2)
I believe the answer is:
leave be
'beverage hopelessly out of fashion' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'stop stirring ale' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'ale' is 'lea' which is located in the answer.
This explanation may well be incorrect...
'into' acts as a link.
Can you help me to learn more?
(Other definitions for leave be that I've seen before include "Refrain from disturbing (someone)" , "Let remain undisturbed" .)