Crossword Genius

When the earth casts no shadow on the entire rear exposure (4,4)

Ross

I believe the answer is:

full moon

I'm a little stuck... Click here to teach me more about this clue!

'when the earth casts no shadow on' is the definition.
I can't tell whether this definition defines the answer.

'entire rear exposure' is the wordplay.
'entire' becomes 'full' (synonyms).
'rear exposure' becomes 'moon' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'full'+'moon'='FULL MOON'

'the' is the link.

Can you help me to learn more?

(Other definitions for full moon that I've seen before include "monthly highlight?" , "Lunar display with full disc illuminated" , "Bright time of the month" , "Wholly illuminated satellite" .)

I've seen this clue in the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.