Moves forward without PR monsters (8)

I believe the answer is:

ogresses

I'm a little stuck... Click here to teach me more about this clue!

'monsters' is the definition.
(I know this)

I don't understand how the rest of the clue works.

(Other definitions for ogresses that I've seen before include "Nasty females" , "ugly women" , "Scary women" , "Female giants in fairytales" , "See gross sort of female giants" .)

I've seen this clue in The Guardian.

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