i was thinking there are atleast 3 categories of instrumental intros that have come up:
1 - the vamp/groove type such as Sundown, ODR, COTR, IISPY, etc
2 - the instrumental version of the main verse/hook (or chorus) type such as IYCRMM, The Wreck, Ghost of Cape Horn, Daylight Katie, DSR, WFY, Spanish Moss, etc
3 - the type I was trying to get at: a distinct instrumental intro that may appear again in the turnaround between chorus and subsequent verses such as Pussywillows, For Lubbin me, Cabaret, All the Bubbly Ladies, CRT, Affair on Eighth Avenue, ICHW, End of All time, Sometimes I Wish, Does Your Mother Know, etc
I will submit these as my choices:
14 Carrot Gold (category 1)
Selfish (category 2)...see shells selfish by the she sore

Shatoes (category 3)
thanks foreplaying
ps) there are a few submitted here that I have to dig out and listen to..yeah, it's shameful that I can't hum all GL intros by heart!