Conservative German, taking drug repeatedly, left fish (6,3)

I believe the answer is:

conger eel

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'fish' is the definition.
(conger eel is a kind of fish)

'conservative german taking drug repeatedly left' is the wordplay.
'conservative' becomes 'con' (abbreviation for Conservative).
'german' becomes 'ger' (abbreviation).
'taking drug' becomes 'e' (E is another name for ecstasy. I am not sure about the 'taking' bit.).
'repeatedly' says to double the letters.
'left' becomes 'L' (common abbreviation).
'e' duplicated is 'ee'.
'con'+'ger'+'ee'+'l'='CONGER-EEL'

Can you help me to learn more?

(Other definitions for conger eel that I've seen before include "long haul?" , "Predatory fish" , "Large slippery fish" , "Predatory sea creature" , "one is long in the water" .)

I've seen this clue in The Guardian.

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