The auction starts
(1♣) 1NT (P) 2♦
(3♣) P (P) X
(P) 3♠ (P) ?
where
1NT = 15-18 BALish, strongly suggests a C stopper
2♦ = transfer to hearts
X = takeout
(Edited to include hand! The trouble with posting late at night and not checking carefully . . . Further edited to specify IMPs and standard of game and partner.)
This post has been edited by DinDIP: 2018-April-17, 06:10