Some of the special armies cause panic (5)

I believe the answer is:

alarm

'panic' is the definition.
(alarm can mean panic or fear)

'some of the special armies cause' is the wordplay.
'some of' indicates a hidden word.
'ALARM' can be found hidden inside 'special armies cause'.

(Other definitions for alarm that I've seen before include "Frighten or startle" , "Worried perhaps if one rings" , "Scare or worry" , "Warning of danger" , "Flap" .)

I've seen this clue in The Irish News.

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