Pleased our auditor has time for a cheap drink (5,4)
I believe the answer is:
happy hour
'a cheap drink' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'pleased our auditor has time' is the wordplay.
I cannot quite understand how this works, but
'pleased' could be 'happy' (pleased means contented) and 'happy' is found in the answer.
'time' could be 'hour' (unit of time) and 'hour' is located in the answer.
No letters remain.
This explanation may well be incorrect...
'for' acts as a link.
Can you help me to learn more?
(Other definitions for happy hour that I've seen before include "Period of reduced prices in public bar" , "beer goes down" , "Cheap time to get merry!" , "glasses are now reduced" , "pub's promotion" .)