Secure grip (8)
I believe the answer is:
purchase
I believe this is a double definition.
'secure' is the first definition.
(thesaurus)
'grip' is the second definition.
(thesaurus)
(Other definitions for purchase that I've seen before include "that has gone through the barcode reader?" , "Procure" , "Buy something" , "Pay money" , "Shop successfully" .)