In stunned state, the Spanish call for leniency (9)
I believe the answer is:
tolerance
'leniency' is the definition.
(thesaurus)
'in stunned state the spanish call' is the wordplay.
'in' means one lot of letters goes inside another.
'stunned state' becomes 'trance' (someone stunned may be in a trance).
'the spanish call' becomes 'ole' (Spanish expression of admiration or encouragement).
'trance' enclosing 'ole' is 'TOLERANCE'.
'for' acts as a link.
(Other definitions for tolerance that I've seen before include "Ability to endure something" , "Being indulgent" , "example of permissiveness" , "Indulgence" , "Understanding" .)