Went up to famous matriarch to get aromatic shrub (8)
I believe the answer is:
rosemary
'aromatic shrub' is the definition.
(I've seen this before)
'went up to famous matriarch' is the wordplay.
'went up' becomes 'rose' (I've seen this in another clue).
'to famous matriarch' becomes 'mary' (I can't explain this - if you can you should give a lot more credence to this answer).
'rose'+'mary'='ROSEMARY'
'to get' is the link.
Can you help me to learn more?
(Other definitions for rosemary that I've seen before include "Herb with narrow leaves" , "One or two girls" , "Herb - girl's name" , "Fragrant evergreen shrub used in cooking" , "Girl's name -- a sorry me! (anag)" .)