Based on the clue 'a cauldron subsidence is when a mass of solid rock...', what is the answer?

Based on the clue 'a catholic religious service plus a standard unit ...', what is the answer? Based on the clue 'a catholic woman a protestant man fall in love in...', what is the answer? Based on the clue 'a cation is a positively charged one of these an a...', what is the answer? What is referred to by 'a catnap'? Based on the clue 'a cause of tension moodiness pms', what is the answer? Based on the clue 'a causeway connects this persian gulf nation with ...', what is the answer? What is associated with: a causeway linking bahrain saudi arabia is named for this man who became saudi king in 1982? Based on the clue 'a caustic substance in soap or an untruth', what is the answer?