Victor seized by Turkish ruler quails (4)
I believe the answer is:
bevy
'quails' is the definition.
(bevy can mean a group of quails)
'victor seized by turkish ruler' is the wordplay.
'victor' becomes 'V' (phonetic alphabet: alpha, bravo, charlie etc.).
'seized by' means one lot of letters goes inside another.
'turkish ruler' becomes 'bey' (I've seen this in another clue).
'v' going within 'bey' is 'BEVY'.
(Other definitions for bevy that I've seen before include "Pack" , "A large group - of beauties?" , "Large group (of people)" , "Flock; alcoholic drink" , "Assemblage" .)