Crossword Genius

Security group getting nothing for so long (4)

Ross

I believe the answer is:

ciao

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'so long' is the definition.
('goodbye' in Italian)

'security group getting nothing' is the wordplay.
'security group' becomes 'cia' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'getting' means one lot of letters go next to another.
'nothing' becomes 'O' (O resembles 0).
'cia'+'o'='CIAO'

'for' is the link.

Can you help me to learn more?

(Other definitions for ciao that I've seen before include "See you in Italy" , "Italian hello or goodbye" , "Informal greeting (Italian)" , "Italian salutation" , "Italian cheerio" .)

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