‘Minor highway that man included in collection': newspaper (10)
I believe the answer is:
broadsheet
'newspaper' is the definition.
(I've seen this before)
'minor highway that man included in collection' is the wordplay.
'minor highway' becomes 'broad' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'that man' becomes 'he' ('he' refers to a man).
'included in' means one lot of letters goes inside another.
'collection' becomes 'set' (set is a kind of collection).
'he' inserted within 'set' is 'sheet'.
'broad'+'sheet'='BROADSHEET'
Can you help me to learn more?
(Other definitions for broadsheet that I've seen before include "cover for king-size mattress?" , "'Serious' newspaper" , "[OPPOSITE OF] Tabloid" , "put to bed?" , "Our sort of paper" .)