Below are possible answers for the crossword clue Top up.
6 letter answer(s) to top up
REFILL
a commercial product that refills a container with its appropriate contents; "he got a refill for his ball-point pen"; "he got a refill for his notebook"
a prescription drug that is provided again; "he got a refill of his prescription"; "the prescription specified only one refill"
fill something that had previously been emptied; "refill my glass, please"
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