Philosopher's daughter rioted, out of order (7)
I believe the answer is:
diderot
'philosopher's' is the definition.
(Denis Diderot)
'daughter rioted out of order' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'out of order' is an anagram indicator.
'rioted' with letters rearranged gives 'iderot'.
'd'+'iderot'='DIDEROT'
(Other definitions for diderot that I've seen before include "Denis --, French philosopher and encyclopedist" , "Denis --, French philosopher; odd rite (anag.)" , "Denis ---, Fr. encyclopaedist" , "Denis --- Fr. encyclopedist, D. editor (anag)" .)