Is your onward flight domestic or international? Will you have a lot of baggage? Have you identified a specific tailor? If so, what time do they open? What day of the week? Even specific date as it may be a holiday?
The SARL trains start running, ~ 06:00 so depending on your destinations, this may be a good option.
The duration of your lay-over would seem to give you enough time get into town, get a fitting, maybe look around a little, grab a bite to eat and get back to the airport.