Some drinks, including the first stout (6)
I believe the answer is:
rotund
'some drinks including the first stout' is the definition.
I can't tell whether this defines the answer.
'including the first stout' is the wordplay.
'including' indicates putting letters inside.
'first' suggests taking the first letters.
'stout' becomes 'round' (I've seen this before).
The initial letter of 'the' is 't'.
't' placed into 'round' is 'ROTUND'.
Can you help me to learn more?
(Other definitions for rotund that I've seen before include "Chubby" , "Bulging" , "Large and plump" , "'Corpulent, round (6)'" , "Portly" .)