Rambler, say, with nothing much to write home about (10)
I believe the answer is:
pedestrian
I believe this clue is a double definition.
'rambler say' is the first definition.
(rambler is a kind of pedestrian)
'nothing much to write home about' is the second definition.
(I've seen this before)
'with' is the link.
(Other definitions for pedestrian that I've seen before include "One walks around" , "Dull; walker" , "nothing much to write home about" , "footman" , "Person walking" .)