Yield from a mine drilling copper overdue (10)
I believe the answer is:
capitulate
'yield' is the definition.
(I've seen this before)
'a mine drilling copper overdue' is the wordplay.
'mine' becomes 'pit' (down the pit).
'drilling' is an insertion indicator.
'copper' becomes 'cu' (chemical symbol).
'overdue' becomes 'late' ('late' can be similar in meaning to 'overdue').
'a'+'pit'='apit'
'apit' going within 'cu' is 'capitu'.
'capitu'+'late'='CAPITULATE'
'from' is the link.
(Other definitions for capitulate that I've seen before include "Surrender" , "Give in" , "Yield" .)