Flier seen at night ran into deer on way up (6)
I believe the answer is:
meteor
'flier seen at night' is the definition.
I can't tell whether this definition defines the answer.
'ran into deer on way up' is the wordplay.
'ran into' becomes 'met' (I've seen this in another clue).
'deer' becomes 'roe' (roe deer is a kind of deer).
'on way up' is a reversal indicator.
'roe' backwards is 'eor'.
'met'+'eor'='METEOR'
Can you help me to learn more?
(Other definitions for meteor that I've seen before include "lump of rock" , "it appears as a streak of light" , "Shooting star" , "Glowing heavenly body" , "Remote type of heavenly body" .)