Related Clues:
- Over one's head
- Seriously committed
- Embroiled, as in controversy
- Committed and then some
- Like snow after a blizzard
- Heavily involved - up to leg joints?
- More than one foot down
- Really involved requirement to break into castle stronghold
- Castle guards want moat to be more than this!
- Want to be in castle and heavily involved
- Want to get into fortress - but only so far!
- (Of water) over the top of one's wellies?
- Halfway up the leg
- Submerged to one's patella
- Irreversibly committed