A game of strategy in the past (3)
I believe the answer is:
ago
'strategy in the past' is the definition.
'ago' can be an answer for 'past' (I've seen this in another clue). I'm not sure about the 'strategy in the' bit.
'a game' is the wordplay.
'game' becomes 'go' (go is a board game).
'a'+'go'='AGO'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for ago that I've seen before include "In past times" , "Time past" , "(Years) before the present time" , "Previously" , "Back (in time)" .)