Put aside novel about the Spanish leader in Valencia (6)
I believe the answer is:
shelve
'put aside' is the definition.
(I've seen this in another clue)
'novel about the spanish leader in valencia' is the wordplay.
'novel' becomes 'she' (novel by H Rider Haggard).
'about' means one lot of letters goes inside another.
'the spanish' becomes 'el' ('the' in Spanish).
'leader in' says to take the initial letters.
The initial letter of 'valencia' is 'v'.
'el'+'v'='elv'
'she' enclosing 'elv' is 'SHELVE'.
(Other definitions for shelve that I've seen before include "Ditch" , "Postpone" , "Abandon, defer" , "Store" , "Put aside for the present - on a ledge?" .)