Note about skating area over time seen as worthless item (7)
I believe the answer is:
trinket
'worthless item' is the definition.
(a trinket is a worthless or insignificant item)
'note about skating area over time' is the wordplay.
'note' becomes 'te' (musical note).
'about' indicates putting letters inside.
'skating area' becomes 'rink' (I've seen this in another clue).
'over time' becomes 't' (abbreviation. I am not sure about the 'over' bit.).
'te' placed around 'rink' is 'trinke'.
'trinke'+'t'='TRINKET'
'seen as' is the link.
(Other definitions for trinket that I've seen before include "Inexpensive ornament" , "Cheap ornament" , "Gewgaw" , "Charm" , "Trifle" .)