Based on the clue 'a thief or the bent part of an arm', what is the answer?

Based on the clue 'a thick cloud cover is one reason temperatures at ...', what is the answer? Based on the clue 'a thick shelled edible clam of the north atlantic ...', what is the answer? Based on the clue 'a thick variety of blanket or a kabul native', what is the answer? Based on the clue 'a thick white type of theatrical makeup is named f...', what is the answer? Based on the clue 'a thief who steals tomes from the library', what is the answer? Based on the clue 'a thin layer of decorative wood used to cover a ch...', what is the answer? Based on the clue 'a thin layer of tissue on an animal', what is the answer? Based on the clue 'a thin layer of tissue the walls of arteries have ...', what is the answer?