Dead bodies initially stashed in luggage under coach (9)

I believe the answer is:

carcasses

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'luggage under coach' is the definition.
I can't tell whether this defines the answer.

'dead bodies initially stashed in' is the wordplay.
'dead bodies' becomes 'carcases' (carcase is a kind of dead body).
'initially' suggests taking the first letters.
'in' is an insertion indicator.
The initial letter of 'stashed' is 's'.
'carcases' going around 's' is 'CARCASSES'.

Can you help me to learn more?

I've seen this clue in The Telegraph.

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