Ancestry showing range and time (7)
I believe the answer is:
lineage
'ancestry' is the definition.
(I know that ancestry can be written as lineage)
'range and time' is the wordplay.
'range' becomes 'line' (I've seen this in other clues).
'and' is a charade indicator (letters next to each other).
'time' becomes 'age' (an age is a period of time).
'line'+'age'='LINEAGE'
'showing' is the link.
(Other definitions for lineage that I've seen before include "Family descent" , "Genealogy" , "Direct descent" , "Ancestral line as seen in eagle" , "Descent (from an ancestor)" .)