Doses of medicine taken in game (8)
I believe the answer is:
draughts
'doses' is the definition.
(I know this)
'medicine taken in game' is the wordplay.
'medicine' becomes 'draught' (draught is a kind of medicine).
'taken in game' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'draught'+'s'='DRAUGHTS'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for draughts that I've seen before include "Board game for two" , "Windows-supplied, pain-in-the neck- inducing" , "Lots of fish caught" , "drinks" , "plans" .)