Notices spots covering nose, oddly (6)
I believe the answer is:
senses
'notices' is the definition.
'spots covering nose oddly' is the wordplay.
'spots' becomes 'sees' (I've seen this before**).
'covering' indicates putting letters inside.
'oddly' means one should take alternating letters.
The alternating letters of 'nose' are 'ns'.
'sees' going around 'ns' is 'SENSES'.
(Other definitions for senses that I've seen before include "Feels intuitively" , "Feels, has some awareness" , "Feelings" , "Faculties for apprehending the external world" , "Sight, hearing, smell, taste and touch" .)