Dig up former explorer (6)
I believe the answer is:
exhume
'dig up' is the definition.
(I know that exhume is a type of dig up)
'former explorer' is the wordplay.
'former' becomes 'ex' (prefix meaning former or onetime).
'explorer' becomes 'hume' (I can't justify this - if you can you should give a lot more credence to this answer).
'ex'+'hume'='EXHUME'
Can you help me to learn more?
(Other definitions for exhume that I've seen before include "Dig up (a corpse)" , "Dig up (a body)" , "Disinter a dead body" , "Dig up, unearth" , "opposite of 5 [ENTOMB]" .)