Would expect to lose a spade and perhaps one other trick somewhere. If partner has a legit raise, he rates to have about an 18 count, with your 9 working, you have 27 on a 30-point deck. Might make seven. My original instinct was to pass, but partner must have a pretty good hand to go to the 5-level opposite a possible Yarborough holding crappy trumps. R OLF Pass.
Partner is marked with a stiff spade.
The more you bid, the better. K98x AKxxxx Axx . Partner had several stronger actions, e.g. passing then bidding 5 . On the other hand, to bid 5 he has to have something good. He has a clue that you do not have a yarborough due to the opponents' saving, but you do have 100 honors in trumps.