Bunch adopting affected attitudes? (4)

I believe the answer is:

posy

I believe this is a double definition.

'bunch' is the first definition.
(bunch of flowers)

'adopting affected attitudes?' is the second definition.
(acting like a poser)

(Other definitions for posy that I've seen before include "Spray" , "Small bouquet" , "'Corsage, nosegay (4)'" , "Small bunch of flowers" , "Pretentious-sounding" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app