Drunk has a little drink in a difficult situation (5,4)
I believe the answer is:
tight spot
'a difficult situation' is the definition.
(I've seen this before)
'drunk has a little drink' is the wordplay.
'drunk' becomes 'tight' (I've seen this before).
'has' means one lot of letters go next to another.
'a little drink' becomes 'spot' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'tight'+'spot'='TIGHT SPOT'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for tight spot that I've seen before include "predicament" , "hole" , "Difficult situation" , "Fix" .)