[luckyloser]

♠3
♥T64
♦AT986
♣9865

pairs, you are vul. rho opens 2s and lho raises to 3s.
p bids 4c.
do you or don´t you?

[whereagles]

of course I do

hand is subpar in HCP but has a couple unexpected good features (long fit, singleton, long ace+intermediates)

[Mbodell]

I'm a chicken and pass. I doubt my spade stiff is a surprise for partner, 4c may already be counting on it. And likely partner isn't playing me for a yarb.

[Wackojack]

Most likely it seems is that opps have a 9 card spade fit and we have a 10 card club fit. Partner did not make a take-out double so most likely shape is 3-3-1-6 . Here is a hand where partner will likely overcall 4♣: ♠xxx ♥KQJ ♦x ♣AKJxxx.

So 5♣ I bid

[billw55]

Four trumps, an ace, and stiff in ops suit? Partner butted in at the 4 level vulnerable? Pass would be absurd, in fact I consider bidding 6.