She promises to give him what he wants (the poet makes no bones about the fact that he only wants her body) provided he takes part in a joust wearing her chemise (underdress) instead of his armour.
Hun lover at give ham, hvad han vil have (og digteren lægger ikke skjul på at han kun vil have hendes krop) efter at han har deltaget i en dyst, hvor han kun har hendes chemise på i stedet for sin rustning.