Related Clues:
- Solid or difficult to do
- Agent tailed and finished off with mace?
- Added zip to
- Not easily solved
- Hurry _____(Skip's command)
- With 60-Down, gotten by great effort
- A____ lesson
- Not soft
- Eddie Vedder "___ Sun"
- Kiss "(You Make Me) Rock ___"
- Difficult — firm
- Newspaper's sure misled about Republican
- Watched secretly around college with added excitement
- Solid, unlike a piece of cake
- Like a tough nut to crack