An aimless order? (4,2,6)

'an aimless order?' is the definition.
The definition suggests a singular noun which matches the answer.

'an aimless order?' is the wordplay.
I cannot really understand how this works, but
'an' could be 'i' (Roman numeral for one) and 'i' is found in the answer.
'order?' could be 'om' (Order of Merit) and 'om' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?