Scope for marginal latitude (6)
I believe the answer is:
leeway
This could be a double definition.
'scope' is the first definition.
(I've seen this before)
'marginal latitude' is the second definition.
'leeway' can be an answer for 'latitude' (I've seen this before). I'm not certain of the 'marginal' bit.
'for' is the link.
Can you help me to learn more?
(Other definitions for leeway that I've seen before include "Drift to make up" , "Allowance" , "Flexibility" , "Scope for freedom of movement or action" , "Space for free movement" .)