put flesh on (the bones of) something
Add more details to something: he has yet to put flesh on his ‘big idea’...- There were a lot of details left to be sorted out to put flesh on the bones.
- The National Museum of Scotland is putting flesh on the bones of the tale this summer, with a major exhibition that looks at both the family's public and private life.
- It was one of those pieces of legislation - a policy which was introduced very quickly, and we are now putting flesh on the bones of that particular policy.
See parent entry: flesh