Craft needed for a game with pencil and paper (11)
I believe the answer is:
battleships
'a game with pencil and paper' is the definition.
I can't tell whether this defines the answer.
'craft needed for' is the wordplay.
'craft' becomes 'battleship' (battleship is a kind of craft).
'needed for' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'battleship'+'s'='BATTLESHIPS'
Can you help me to learn more?
(Other definitions for battleships that I've seen before include "Game in which naval vessels are located and sunk" , "Fighting vessels" .)