Related Clues:
- Call one's bluff
- Intensify a situation
- Get serious, gambler-style
- Call one's bluff, in a way
- Pet tuna he used to raise poker stakes
- Raise the stakes in poker game
- Put more at risk
- Play for higher stakes
- Put ethane in mixture, and increase risks
- Lift stakes, then put a new fence at last
- Increase the risks, having climbed the volcano from the back
- Put out two forms of energy, including nuclear, principally to increase risk
- Hate punt going wrong? Finally decide to bet even more
- UN, pet hate, mobilised to increase risk?
- How one might find Etna to increase danger?