Show collection of jumbos? (6)
I believe the answer is:
parade
This could be a double definition.
'show' is the first definition.
(parade is a kind of show)
'collection of jumbos?' is the second definition.
'parade' can be an answer for 'collection' (parade is a kind of collection). I'm unsure of the 'of jumbos?' bit.
Can you help me to learn more?
(Other definitions for parade that I've seen before include "Flaunt; ceremonial march" , "March-past of troops etc." , "Cavalcade or procession" , "Ostentation" , "Assembly of troops for inspection" .)