Hello Uday,

<field name="groups_id" eval="[(3, ref('base_accounting_kit.group_account_cashier'))]"/>

In your case, the menu has no groups assigned, so 3, has no effect.

The 3,  works only if the menu already has assigned groups.(it removes the specified group.)

In your case you want to restrict the menu  to a specific group, so you need to overwrite all existing groups using 6, 

<record id="account.menu_finance_entries" model="ir.ui.menu">

    <field name="groups_id" eval="[(6, [ref('base_accounting_kit.group_account_cashier')])]"/></record>

I hope this is helpful for you..