__ Cheese Gromit!, Wallace Catchphrase
Puzzle 20 of Nordic Connections Hard Pack
Question is: __ Cheese Gromit!, Wallace Catchphrase
and the answer is: CRACKING
Word Meaning:
CRACKING — (organic chemistry, petrochemistry) The thermal decomposition of a substance, especially that of crude petroleum in order to produce petrol / gasoline.
Definitions from Wiktionary.