More than one bird in negligee, seductively (5)
I believe the answer is:
geese
'more than one bird' is the definition.
(goose is a kind of bird)
'in negligee seductively' is the wordplay.
'in' indicates the answer is hidden within the clue.
'GEESE' can be found hidden inside 'negligee seductively'.
(Other definitions for geese that I've seen before include "Long-necked, migratory aquatic birds" , "Large farm birds" , "They come in gaggles and skeins" , "They're seen in a gaggle" , "Birds in a gaggle" .)