clinker

definition: a hard brick used as a paving stone
example:
speech part: noun
synonyms: clinker brick
definition: a fragment of incombustible matter left after a wood or coal or charcoal fire
example:
speech part: noun
synonyms: cinder
definition: to turn to clinker or form clinker under excessive heat in burning
example:
speech part: verb
synonyms:
definition: to clear out the cinders and clinker from
example: We clinkered the fire frequently.
speech part: verb
synonyms:

How clinker is being used?