Member reaches South Africa to get material (7)
I believe the answer is:
organza
'material' is the definition.
(organza is a kind of material)
'member reaches south africa' is the wordplay.
'member reaches' becomes 'organ' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'south africa' becomes 'za' (abbreviation for Zuid-Afrika).
'organ'+'za'='ORGANZA'
'to get' is the link.
Can you help me to learn more?
(Other definitions for organza that I've seen before include "Transparent silky material" , "Silky cloth" , "Thin stiff dress fabric" , "dress material" , "Silk (or silk-like) fabric" .)