Free to find distance approximate (9)
I believe the answer is:
footloose
'free' is the definition.
(I've seen this before)
'distance approximate' is the wordplay.
'distance' becomes 'foot' (I have seen 'Imperial distance' mean 'foot' so perhaps 'distance' could also mean 'foot').
'approximate' becomes 'loose' (I can't explain this - if you can you should give a lot more credence to this answer).
'foot'+'loose'='FOOTLOOSE'
'to find' is the link.
Can you help me to learn more?
(Other definitions for footloose that I've seen before include "Able to go" , "without responsibility?" , "Free from ties" , "Able to travel freely and do as one pleases" , "Fancy-free" .)