His 'n her terrible drink (7)
I believe the answer is:
rhenish
'drink' is the definition.
The answer and definition are not the same part of speech.
'his 'n her terrible' is the wordplay.
'terrible' is an anagram indicator.
'his'+'n'+'her'='hisnher'
'hisnher' with letters rearranged gives 'RHENISH'.
Can you help me to learn more?
(Other definitions for rhenish that I've seen before include "Of the river Rhine" , "white wine" , "eg Hock" , "Hock - relating to a European river" , "as a European banker" .)