Secure ground for delivery (6)
I believe the answer is:
rescue
'for delivery' is the definition.
(synonyms)
'secure ground' is the wordplay.
'ground' is an anagram indicator ('grind' the letters into a new form).
'secure' with letters rearranged gives 'RESCUE'.
(Other definitions for rescue that I've seen before include "Save from danger or distress" , "Pull from danger" , "Free someone from trouble" , "Save someone from a dangerous situation" , "saving" .)