You can set Sleep Timer if you want to pause music after a set time.

To set Sleep Timer, you should go to "My Account" tab from bottom navigation section > Click on "Sleep Timer" under "Music Listening Preferences" > Set time when you want music to stop > Click OK. 

Music would automatically stop at the set time.

Once sleep timer is set, you would also see a notification in Notification Tray saying "Wynk Sleep Timer Active. Music will stop playing at the set time". 

Note: Sleep Timer feature is only available in updated version (2.0.0.7) of Wynk Music application.