Step from carriage on way through town (5)
I believe the answer is:
stair
'step' is the definition.
('stair' can be a synonym of 'step')
'carriage on way through town' is the wordplay.
'carriage' becomes 'air' (I've seen this before**).
'on' says to put letters next to each other.
'way through town' becomes 'st' (abbreviation for street).
'air' after 'st' is 'STAIR'.
'from' is the link.
(Other definitions for stair that I've seen before include "One of a 15" , "single step in a series" , "Bit of a flight!" , "Flight unit" , "means to go down" .)