Clear Formik field with initial value React

You're totally right - if you have some initial form state, the resetForm action will set the values to those initials. setFieldValue probably the only way to manually clear the field:

<button type="button" onClick={() => setFieldValue('q', '')}>
  Drop field
</button>

notice, type='reset' not need here...

In case when you need to drop multiple fields, take a look at this method: setValues({q: ''})