Crossword Genius

Caught with order for crystal-meth (5)

Ross

I believe the answer is:

crank

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

'crystal-meth' is the definition.
I can't tell whether this definition defines the answer.

'caught with order' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'with' means one lot of letters go next to another.
'order' becomes 'rank' (rank order is a kind of order).
'c'+'rank'='CRANK'

'for' acts as a link.

Can you help me to learn more?

(Other definitions for crank that I've seen before include "Eccentric - starting handle" , "Turn (engine handle); eccentric" , "Person with strange ideas, or machine part" , "Turn a handle - weirdo" , "Person with strange and often aggressive ideas" .)

I've seen this clue in The Independent.
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