on-side
adjective
Definitions
Not in an offside position; In the part of the playing area where one can legally play the ball, puck, etc.
Example: The goal was allowed because the attacker was onside.
On the side of a vehicle from which the driver, paddler, etc. propels it.
Favourably located, from the point of view of the player taking a finesse.
In agreement or support; on board.