Older family members get on after row (7)
I believe the answer is:
lineage
'row' is the definition.
(thesaurus)
'older family members get on after' is the wordplay.
'older family members' becomes 'line' (I can't explain this - if you can you should give a lot more credence to this answer).
'get on' becomes 'age' (synonyms).
'after' is a charade indicator (letters next to each other).
'line'+'age'='LINEAGE'
Can you help me to learn more?
(Other definitions for lineage that I've seen before include "Ancestry, sequence of descendants" , "Descent from ancestors" , "Line of descendants of an ancestor" , "Genealogy" , "Descent (from an ancestor)" .)