Possible Clues:

• Observe, when you turn to look
• Act as custodian of central tower
• & 11 Stay cheerful, displaying a certain amount of neck?
• Hang on to ... or a word that can precede either half of the answer to each starred clue
• Don't let go
• Observe, when you look up
• Don't give a look-up to the castle
• Stock needing a quick look over
• ____ time
• Take a look up at the castle