Clck-hold or right click on the Recompose tool.
Doh! Thanks Barbara for your answer. I was really tired when I inadvertly right clicked on the crop tool to reveal the recompose tool. I've done it before; I just couldn't remember what I did to make the crop tool go away. Now, I'll remember for a long time - er, what was it I had to remember? Oh, yes, the recompose tool. Got it.