Height of joy? Collecting fragments of Everest (9)
I believe the answer is:
elevation
'height' is the definition.
(I've seen this before)
'joy? collecting fragments of everest' is the wordplay.
'joy?' becomes 'elation' (elation is a kind of joy).
'collecting' is an insertion indicator.
'fragments of everest' becomes 'ev' (I can't justify this - if you can you should give a lot more credence to this answer).
'elation' going around 'ev' is 'ELEVATION'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for elevation that I've seen before include "Height - a live note (anag)" , "plan" , "Height - promotion" , "high ground" , "Side of a building; height" .)