Perseverance from number visiting a large town (8)
I believe the answer is:
tenacity
'perseverance' is the definition.
(I know that perseverance can be written as tenacity)
'number visiting a large town' is the wordplay.
'number' becomes 'ten' (ten is a kind of whole number).
'visiting' says to put letters next to each other.
'large town' becomes 'city' (I've seen this before).
'ten'+'a'+'city'='TENACITY'
'from' is the link.
(Other definitions for tenacity that I've seen before include "Ability to stick firmly to task or position" , "Firmness of hold" , "Perseverance in chosen course" , "Dogged resolve" , "Stubbornness, determination" .)