New missile, limited in scope (6)
I believe the answer is:
narrow
'limited in scope' is the definition.
(I've seen this in another clue)
'new missile' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'missile' becomes 'arrow' (arrow is a kind of missile).
'n'+'arrow'='NARROW'
(Other definitions for narrow that I've seen before include "Thin; taper" , "with not much room to spare" , "Small in breadth" , "contract" , "Lacking tolerance" .)