Some people play a relay structure over this (the below is shamelessly copied from Gnome), where opener usually puppets to 2♦ (any minimum without 6 spades) to allow the 2♣ bidder to finish describing his hand. So over, say, 1♠-2♣, opener usually bids 2♦ and responder proceeds with: 2♥ - balanced GF, 2♠ 2♠ - balanced GF, 3♠ and 5+♣ 2NT - balanced GF, 3♠, 4 or fewer ♣