Step 1 fund your Circle account
Step 2 withdraw to your Coinbase / Shift card
Enjoy
Circle is the worst of all online wallets. They do not provide any private key, well you may argue most online wallet providers does not provide that too, but they have accusations of just locking your funds without any notice and there is no way to contact them. Moreover, its service is not available to all countries. Please read the reviews about circle and take your decision.