In this game, a man can become king (8)
I believe the answer is:
draughts
'in this game' is the definition.
'draughts' can be an answer for 'game' (draughts is a kind of game). I'm unsure of the remainder of the definition.
'a man can become king' is the wordplay.
I cannot quite understand how this works, but
'a' is within the answer.
'man' could be 'dru' and 'dru' is found in the leftover letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for draughts that I've seen before include "the Windies are presumably good at?" , "Board game for two" , "They may make people cold" , "Checkerboard game for two players" , "medical doses" .)