EW play Acol, 12-14 no trump, and this was their bidding sequence to a dreadful contract. There was some discussion about the hand afterwards.
EW have the fairly common agreement among non-experts that 1♠ promised 5+ spades. The club expert was firmly of the opinion that West should have passed 4♠ or that East should have corrected to 5♠ over 5♣. West himself thought that as East had started cue-bidding with 4♦ he couldn't be confident that 4♠ was a suggestion to play rather than another cue-bid, and couldn't be sure that East had any spade support. The expert countered that East should not cue-bid 2♥ without three-card support for spades. West said that even if East does have three spades, he can't really pass 4♠ when there are still good chances of a slam.
No one reached a slam, but many pairs played in a spade game.
What do you think, particularly about the meaning of East's 4♠ bid?

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ing) tr. v. - Any bid made by bridge player with which partner disagrees.
.P....P...1♣..1♥
1♠...P...2♥...X
4♣...P...4♦...P
4♥...P...4♠...P
5♣...P....P....P