Height of euphoria about English verse (9)
I believe the answer is:
elevation
'height' is the definition.
(I know that height can be written as elevation)
'euphoria about english verse' is the wordplay.
'euphoria' becomes 'elation' (I've seen this before).
'about' means one lot of letters goes inside another.
'english' becomes 'E' (abbreviation as in OED).
'verse' becomes 'v'.
'e'+'v'='ev'
'elation' going around 'ev' is 'ELEVATION'.
'of' is the link.
(Other definitions for elevation that I've seen before include "Drawing of the external face of a building" , "Height above sea level" , "Diagram" , "Height above a given level" , "Side of a building; height" .)