19d - Sweet, there's nothing in it - lose heart (5) I have - D???? ( Droop?) 22a - One having the same again in an international language (3) I have - I?? 24a - Most popular with the voters (3,2,3,4) I have - T??,?F,?H?,P?L? ( top of the pole ? )
Note: Last letter of 22a is 3rd letter of 19d and 3rd letter of 24a is last letter of 19d.