Alan Brown's view:

N pass
E has enough to open 2♣
S not many points but so shapely and also n/v against vul. And also bidding will disrupt the enemy so should bid 3♣, 4♣ if feeling frisky.
W straightforward 3♥
N tempting to bid 5♣
E 5♠ - at the 5 level before I can show my suit !
S got to pass
W South must have 6♣ and partner has jumped to 5♣ so must have 4 of them. Therefore partner can only have a singleton. With my ♦ void and super support I think I can safely bid 6♠