Liberal American needing alias for capital (6)
I believe the answer is:
lusaka
'capital' is the definition.
(Lusaka is an example)
'liberal american needing alias' is the wordplay.
'liberal' becomes 'l' (abbreviation).
'american' becomes 'us'.
'needing' says to put letters next to each other.
'alias' becomes 'aka' ('a.k.a.' can be a synonym of 'alias').
'l'+'us'+'aka'='LUSAKA'
'for' is the link.
(Other definitions for lusaka that I've seen before include "African capital - UK alas (anag)" , "Capital of Zambia" , "Zambian city" , "Central African capital" , "Zambian capital" .)