Laze mindlessly, seen regularly around desert (5)
I believe the answer is:
negev
'desert' is the definition.
(I know that Negev is a desert)
'laze mindlessly seen regularly around' is the wordplay.
'laze mindlessly' becomes 'veg' (as in 'vegging out').
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'around' says the letters should be written in reverse.
The alternate letters of 'seen' are 'en'.
'veg'+'en'='vegen'
'vegen' backwards is 'NEGEV'.
(Other definitions for negev that I've seen before include "Southern Israeli desert" , "Wilderness" , "part of Israel" , "Israeli desert area abutting Sinai" , "Desert region in Israel" .)