He fixes shoes using a cool drink (7)
I believe the answer is:
cobbler
'a cool drink' is the definition.
'cobbler' can be an answer for 'drink' (cobbler is a kind of drink). I am unsure of the 'a cool' bit.
'he fixes shoes' is the wordplay.
'he' becomes 'Cob'.
'fixes shoes' becomes 'bler' (I am not sure about this - if you are sure you should believe this answer much more).
'cob'+'bler'='COBBLER'
'using' acts as a link.
Can you help me to learn more?
(Other definitions for cobbler that I've seen before include "one working at last" , "iced liqueur" , "Mender of shoes - fruit pie" , "Iced drink - fruit pie with a crunchy topping" , "Man at last" .)