Suspicious-looking coal in fuel receptacle (6)

I believe the answer is:

oilcan

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'suspicious-looking coal' is the definition.
I can't judge whether this definition defines the answer.

'fuel receptacle' is the wordplay.
'fuel' becomes 'oil' (oil is a type of fuel).
'receptacle' becomes 'can' (type of receptacle or vessel).
'oil'+'can'='OILCAN'

'in' is the link.

Can you help me to learn more?

(Other definitions for oilcan that I've seen before include "Container used in lubricating machinery" , "Lubricator with a long nozzle" , "Lubricant applier" , "Lubricant container" , "Lubricant holder" .)

I've seen this clue in The Irish Times.

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