Soldiers trail army strike in retreat (10)

I believe the answer is:

paratroops

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

'trail army strike in retreat' is the wordplay.
'trail' becomes 'spoor' (spoor is a kind of trail).
'army strike' becomes 'tarap' (I am not sure about this - if you are sure you should believe this answer much more).
'in retreat' says the letters should be written in reverse.
'spoor'+'tarap'='spoortarap'
'spoortarap' written backwards gives 'PARATROOPS'.

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(Another definition for paratroops that I've seen is " Soldiers".)

I've seen this clue in The Telegraph.

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