Leaders from all sides in seven cities frantically needing capital, perhaps? (4-9)

'capital perhaps?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'leaders from all sides in seven cities frantically' is the wordplay.
'leaders from' suggests taking the first letters.
'in' means one lot of letters goes inside another.
'frantically' is an anagram indicator.
The first letters of 'all sides' is 'as'.
'seven'+'cities'='sevencities'
'sevencities' with letters rearranged gives 'cesensitive'.
'as' put inside 'cesensitive' is 'CASE-SENSITIVE'.

'needing' acts as a link.

Can you help me to learn more?