It could bomb Moscow for starters (4)

I believe the answer is:

icbm

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'it could bomb moscow for starters' is the definition.
The definition suggests a singular noun which matches the answer.

'it could bomb moscow for starters' is the wordplay.
'for starters' suggests taking the first letters.
The initial letters of 'it could bomb moscow' is 'ICBM'.

Can you help me to learn more?

(Other definitions for icbm that I've seen before include "Missile" , "Kind of powerful rocket" .)

I've seen this clue in The Irish Times.

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