In depression find a place to drink (6)
I believe the answer is:
trough
'in depression' is the definition.
'trough' can be an answer for 'depression' (trough is a kind of depression). I'm not sure about the 'in' bit.
'a place to drink' is the wordplay.
I cannot really understand how this works, but
'place' could be 'rough' (rough is a kind of place) and 'rough' is located in the answer.
A single letter 't' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
'find' acts as a link.
Can you help me to learn more?
(Other definitions for trough that I've seen before include "Hollow between waves" , "Depression - container for food or water for animals" , "Long narrow container used to feed animals" , "Container for watering or feeding animals" , "Hollow between wave crests" .)