Crossword Genius

Periodically they arm squad (4)

Ross

I believe the answer is:

team

'squad' is the definition.
('team' can be a synonym of 'squad')

'periodically they arm' is the wordplay.
'periodically' indicates alternate letters (letters must be selected 'every so often').
'they'+'arm'='theyarm'
The alternate letters of 'theyarm' are 'TEAM'.

(Other definitions for team that I've seen before include "Crew" , "eleven?" , "Group or squad" , "See 22" , "Group pulling together" .)

I've seen this clue in The Telegraph.
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