How many letters does the top answer for “on, to, or at the top” have?

The most common answer is atop (4 letters).

Crossword clue: on, to, or at the top

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

atop 4 letters wn-def

on, to, or at the top

album by top 50% similar → afterburner, eliminator, riograndemud

at or nearest to the top 50% similar → topmost, upmost, uppermost

lie at the top of 50% similar → cap

on or at the top. milton. 50% similar → atop

place on top of 50% similar → superimpose, superpose

the top of a hill. 50% similar → hilltop

the top of a roof 50% similar → rooftop

the top of the head 50% similar → pate