Possible Clues:

• Half way up one's legs
• Very involved, as in controversy
• Want to be in castle and heavily involved
• Want to get into fortress - but only so far!
• Involved but not up to one�s neck
• Heavily involved - up to leg joints?
• Somewhat buried (in)
• Inundated, maybe
• Very much involved in maintenance - a prerequisite
• Deeply involved (in something)