Looking for mate, you'll need this! (5,3)
I believe the answer is:
chess set
'looking for mate you'll need this' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for chess set that I've seen before include "men, along with the board" , "It's played on a chequered board with 32 pieces" , "Game with kings, queens and bishops" , "King, pawns etc." , "It's played with kings, queens and bishops" .)