Germanium, brown coal and jelly (9)
I believe the answer is:
gelignite
'jelly' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'germanium brown coal' is the wordplay.
'germanium' becomes 'Ge' (Ge is the chemical symbol for germanium).
'brown coal' becomes 'lignite' (synonyms).
'ge'+'lignite'='GELIGNITE'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for gelignite that I've seen before include "Explosive used in mining" , "Tieing leg up in explosive" , "factor in altering mine?" , "source of flare-up" , "(E.g. quarry) explosive" .)