Black American finds transport (3)
I believe the answer is:
bus
'transport' is the definition.
(I know that bus is a kind of the transport)
'black american' is the wordplay.
'black' becomes 'b' (abbreviation as in pencil hardness).
'american' becomes 'US' (United States).
'b'+'us'='BUS'
'finds' acts as a link.
(Other definitions for bus that I've seen before include "Public transport vehicle" , "Of projectiles; (go) mad (slang)" , "Means of public transport" , "Use transport" , "Something caught" .)