Elderberry Wine and Elderberry Cough Mixture Making. Can Anyone Help with the Following Please?

I Am Fairly New to Wine Making using Elderberries and I have Just Transferred the fermenting wine from the brewing bucket into a demijohn (Fitted with an airlock) for the 'Secondary Stage of Fermentation'. However, I have a bit of wine leftover from the 'bucket' (about 2/3 pint maybe) But Not Enough to Use in a 2nd Demijohn (Though it is in an airlock fitted spare demijohn at the moment). So I wondered if it may be possible to use this leftover to make an Elderberry Linctus/Cough Mixture, and if so how? I would be very grateful for any advice about this as it would be a shame to waste it. Kind Regards Paul