Range of morning section (5)
I believe the answer is:
ambit
'range' is the definition.
('ambit' can be a synonym of 'range')
'morning section' is the wordplay.
'morning' becomes 'am'.
'section' becomes 'bit' (I've seen this in other clues**).
'am'+'bit'='AMBIT'
'of' is the link.
(Other definitions for ambit that I've seen before include "Scope, extent, or bounds of something" , "round" , "Circuit, compass" , "Scope or confines" , "Limits" .)