Sorry for not replying sooner but I'm a rubbish clue setter so anyone can jump in. Thanks to those who are skilled at it though.I knew it wouldn't last long . . . over to you, Fred.
I'll go with a bit of a guess, maybe Valentine Hole?Then I shall jump in....
In NC1, endless valley holds the one in fashion! ( 9,4 )
And not Fell.Nothing missing, but cave definitely in the Dales.