Will Halley's arrive on Tuesday? (5)
I believe the answer is:
comet
'will halley's' is the definition.
I can't tell whether this defines the answer.
'arrive on tuesday?' is the wordplay.
'arrive' becomes 'come' (synonyms).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'tuesday?' becomes 't'.
'come'+'t'='COMET'
Can you help me to learn more?
(Other definitions for comet that I've seen before include "One is named after Edmond Halley" , "High-flyer" , "Object in space with bright centre and long hazy tail" , "Tailed space traveller" , "Heavenly visitor" .)