A number, for example, visiting Bury? (7)
I believe the answer is:
integer
'a number' is the definition.
(I know that integer is a type of real number)
'example visiting bury?' is the wordplay.
'example' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'visiting' indicates putting letters inside.
'bury?' becomes 'inter' (to inter is to put into the ground).
'eg' going into 'inter' is 'INTEGER'.
'for' acts as a link.
(Other definitions for integer that I've seen before include "Treeing (anag.)" , "rational number remains" , "The whole thing" , "Perhaps 60,000" , "Whole unit" .)