Related Clues:

• Stick to one's guns
• Hold to one's policy
• Keep cards in rack each year close to Lent
• Stick stubbornly to a decision
• Refuse to move most of those in 21 down, 23 down and 19 down (5,3'1,6)
• Refuse to abandon one's position
• Hold one's hand?
• Could this make sandstone be firm?