Healthy walk conforming to government policy (14)
I believe the answer is:
constitutional
'healthy walk' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for constitutional that I've seen before include "A walk taken for its benefit to health" , "For lawyer, perfectly good" , "Conforming to all the rules" , "authorised by the body politic" , "healthy exercise" .)