Crossword Genius

One working to stop tracks like heavy metal? (5)

Ross

I believe the answer is:

irony

I'm a little stuck... Click here to teach me more about this clue!

'heavy metal?' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

'one working to stop tracks' is the wordplay.
'one' becomes 'i' (Roman numeral).
'working' becomes 'on' (on can mean working or activated).
'to stop' means one lot of letters goes inside another (inserted letters plug or stop a gap).
'tracks' becomes 'RY' (abbreviation for railway).
'on' placed into 'ry' is 'rony'.
'i'+'rony'='IRONY'

'like' acts as a link.

Can you help me to learn more?

(Other definitions for irony that I've seen before include "Socratic method of discussion" , "Might this be dramatic" , "type of discussion, originally" , "Gentle sarcasm" , "Satirical speech form" .)

I've seen this clue in The Independent.
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