A good sword of sorts for old warriors (4,2,3)

I believe the answer is:

dogs of war

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'old warriors' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'a good sword of sorts' is the wordplay.
'good' becomes 'g' (abbreviation).
'sorts' indicates anagramming the letters (I've seen 'sort' mean this).
'a'+'g'+'sword'+'of'='agswordof'
'agswordof' anagrammed gives 'DOGS OF WAR'.

'for' is the link.

Can you help me to learn more?

(Other definitions for dogs of war that I've seen before include "Pillaging soldiers" , "forces" , "Some of man's best friends" , "mercenaries!" .)

I've seen this clue in the Sydney Morning Herald.

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