Maintenance of any limo could be difficult (7)

I believe the answer is:

alimony

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'maintenance' is the definition.
(synonyms)

'any limo could be difficult' is the wordplay.
'any limo' anagrams to 'ALIMONY'.
But, I'm not clear how the anagram is indicated.

'of' is the link.

Can you help me to learn more?

(Other definitions for alimony that I've seen before include "Allowance paid to divorced person" , "Payment to spouse after separation" , "divorce arrangement" , "Allowance due to be paid after separation" , "Payment to divorcee" .)

I've seen this clue in The Hindu.

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