__ Ring, Used on a Gas Hob With an Espresso Maker

This page is the CodyCross answer for the clue below from Home Sweet Home, Group 631, Puzzle 1 (Precious Heirlooms).

Question is: __ Ring, Used on a Gas Hob With an Espresso Maker

and the answer is: REDUCER

Word Meaning:

REDUCER — Something or someone that reduces.

Definitions from Wiktionary.