Curiosity in queen's visit is spreading (15)

I believe the answer is:

inquisitiveness

'curiosity' is the definition.
(inquisitiveness is a kind of curiosity)

'in queen's visit is spreading' is the wordplay.
'spreading' is an anagram indicator.
'queens'+'visit'+'is'='queensvisitis'
'queensvisitis' with letters rearranged gives 'quisitiveness'.
'in'+'quisitiveness'='INQUISITIVENESS'

(Another definition for inquisitiveness that I've seen is " Interest in".)

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