Questions & Answers about Bivši vođa je u gradu.
Because some Croatian nouns for people end in -a even when they are not feminine in meaning.
Vođa is one of those nouns. It can refer to a man or a woman.
In your sentence, bivši is in the masculine form, so the phrase suggests a male former leader. If the speaker clearly meant a female leader, many speakers would use bivša vođa.
So the important point is:
- vođa stays vođa
- the adjective can help show whether the referent is male or female