Changed the plane for Jumbo (8)
I believe the answer is:
elephant
'jumbo' is the definition.
(Jumbo was an elephant who lived in London Zoo)
'changed the plane' is the wordplay.
'changed' indicates anagramming the letters.
'the'+'plane'='theplane'
'theplane' with letters rearranged gives 'ELEPHANT'.
'for' is the link.
(Other definitions for elephant that I've seen before include "Animal with a trunk" , "Large animal found in the plane?" , "Trunk on one" , "Largest living land animal" , "Trunk carrier?" .)