Real Dub ground is made to last (7)
I believe the answer is:
durable
'made to last' is the definition.
(I've seen this before)
'real dub ground' is the wordplay.
'ground' indicates an anagram (grind the letters ).
'real'+'dub'='realdub'
'realdub' with letters rearranged gives 'DURABLE'.
'is' is the link.
(Other definitions for durable that I've seen before include "existing for a long time" , "Made to last" , "Likely to last" , "Rugged; long-lasting" , "Capable of lasting" .)