Be in a position to buy someone a drink (5)
I believe the answer is:
stand
'be' is the definition.
(I know that stand is a kind of be)
'a position to buy someone a drink' is the wordplay.
I cannot really see how this works, but
'a' could be 'an' and 'an' is found within the answer.
The remaining letters 'std' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for stand that I've seen before include "Decline to interfere when one should?" , "stay the same in position" , "Seek election; attitude" , "group of trees" , "station" .)