Ruin, just after blocking military conflict (10)

I believe the answer is:

disharmony

'conflict' is the definition.
(I've seen this before)

'ruin just after blocking military' is the wordplay.
'ruin' becomes 'dish' (I've seen this before).
'just after' becomes 'on'.
'blocking' means one lot of letters goes inside another (to block can mean to plug a gap in something).
'military' becomes 'army' (the armed forces).
'on' inserted into 'army' is 'armony'.
'dish'+'armony'='DISHARMONY'

(Another definition for disharmony that I've seen is " conflict".)

I've seen this clue in The Independent.

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