### Clue: Metal block's hot, with raised thermal resistance (5)
### Answer: INGOT 
 ### Explanation: Definition: Metal block
 IN(hot;popular at the moment) **plus**(with) **reversal of**(raised, in a down clue) TOG(a unit of thermal resistance to measure the insulating capability of a fabric, garment, etc.).
The following pictures have unidentified links to the puzzle.
*(Please post comments on ONLY the picture quiz hereinbelow. To post comments on the crossword puzzle, please click .)