Of great vertical extent (4)
I believe the answer is:
high
(Other definitions for high that I've seen before include "Euphoric; going off" , "Shrill" , "Hypertension" , "Relatively great or specific elevation" , "Great in rank" .)
I believe the answer is:
high
(Other definitions for high that I've seen before include "Euphoric; going off" , "Shrill" , "Hypertension" , "Relatively great or specific elevation" , "Great in rank" .)