A rocky romance with I and drink (9)
I believe the answer is:
americano
'drink' is the definition.
(I've seen this before)
'a rocky romance with i' is the wordplay.
'rocky' indicates an anagram.
'with' says to put letters next to each other.
'romance' after 'i' is 'iromance'.
'iromance' with letters rearranged gives 'mericano'.
'a'+'mericano'='AMERICANO'
'and' is the link.
(Other definitions for americano that I've seen before include "drink" , "Espresso diluted with hot water" , "Style of coffee" .)