National symbol, not that large, wrapped in note (7)
I believe the answer is:
thistle
'national symbol' is the definition.
(symbol of Scotland)
'not that large wrapped in note' is the wordplay.
'not that' becomes 'this' (I've seen this before).
'large' becomes 'l'.
'wrapped in' means one lot of letters goes inside another.
'note' becomes 'te'.
'l' inserted inside 'te' is 'tle'.
'this'+'tle'='THISTLE'
(Other definitions for thistle that I've seen before include "Scots plant emblem" , "Prickly plant (Carduus)" , "Scottish plant emblem" , "Scots national emblem" , "Flower of Scotland" .)