Raised fish process margin of safety (6)
I believe the answer is:
leeway
'margin of safety' is the definition.
(I've seen this before)
'raised fish process' is the wordplay.
'raised fish' becomes 'lee' (I can't explain this - if you can you should give a lot more credence to this answer).
'process' becomes 'way' (way is a kind of process).
'lee'+'way'='LEEWAY'
Can you help me to learn more?
(Other definitions for leeway that I've seen before include "Space for free movement" , "Drift - scope for action" , "Slack" , "Allowable margin, latitude" , "Give" .)