Tricky Pisa road race, covering a lot of ground (8)
I believe the answer is:
diaspora
'race covering a lot of ground' is the definition.
I can't judge whether this defines the answer.
'tricky pisa road' is the wordplay.
'tricky' indicates anagramming the letters.
'pisa'+'road'='pisaroad'
'pisaroad' anagrammed gives 'DIASPORA'.
Can you help me to learn more?
(Other definitions for diaspora that I've seen before include "Great dispersion of people, Jews or Irish" , "race round the world" , "The dispersion of Jews throughout the world" , "people's movement" , "The scattering of a nation's people" .)