Sailor with coat and first man to cover a road? (10)

I believe the answer is:
tarmacadam
'cover a road?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'sailor with coat and first man' is the wordplay.
'sailor' becomes 'tar' (slang term for a sailor).
'with' is a charade indicator (letters next to each other).
'coat' becomes 'mac' (mac is a kind of coat).
'and' means one lot of letters go next to another.
'first man' becomes 'adam' (first man in the Bible).
'tar'+'mac'+'adam'='TARMACADAM'
'to' is the link.
Can you help me to learn more?
(Other definitions for tarmacadam that I've seen before include "Road surface" , "Road-surfacing material" , "Road surfacing" , "could cover one's tracks" .)
