How to bid 6♣ 5♠ hand.

Bidding in order could risk showing a reverse, but not with this bid shape unless partner responds 1NT when 2♠ would be a reverse. So here

1♣ by East followed by 1♥  from West.

East can bid 1♠ without it being a reverse, though with the powerful shape 5026 and 5 loser hand it is quite strong distributionallly.

West has a difficult call, showing a preference to ♣ s or supporting ♠ s by bidding 2♠.

If West bids 2♠  e/W will end up in 4♠.

Over 2♣ East can show the shape by bidding 2♠ again, when West will bid 3♠ and East will put them into game. East could stand West bidding ♣ s again if no spade support.