Pleasant around even parts of North - observe (6)
I believe the answer is:
Here is my best explanation:
'observe' is the definition.
(noticing is a kind of observing)
'pleasant around even parts of north' is the wordplay.
'pleasant' becomes 'nice' ('nice' is associated in meaning with 'pleasant').
'around' is an insertion indicator.
'even parts of' indicates alternate letters.
The alternating letters of 'north' are 'ot'.
'nice' enclosing 'ot' is 'NOTICE'.
(Other definitions for notice that I've seen before include "Mark", "A review; observe", "Review - poster", "Heed", "Notification", "Announcement with information about a future event", "Information of future events", "Become aware of; review", "Formal advice - to quit?" and "Announcement (of the sack?)".)