Rascals regularly hid my post (4)
I believe the answer is:
imps
'rascals' is the definition.
('imp' can be a synonym of 'rascal')
'regularly hid my post' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'hid'+'my'+'post'='hidmypost'
The alternate letters of 'hidmypost' are 'IMPS'.
(Other definitions for imps that I've seen before include "naughty children" , "Mischievous spirits" , "Mischievous characters" , "Mischievous sprites" , "Cheeky little devils" .)