Looking up naturally allows review, initially of celestial object (5)

I believe the answer is:

lunar

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'looking up naturally allows review initially of celestial object' is the definition.
I can't judge whether this definition defines the answer.

'looking up naturally allows review initially' is the wordplay.
'initially' suggests taking the first letters.
The initial letters of 'looking up naturally allows review' is 'LUNAR'.

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(Other definitions for lunar that I've seen before include "Kind of eclipse" , "Period of 28 days" , "that could describe landscape with more than one mare" , "Relating to the moon" , "Selenic" .)

I've seen this clue in The Independent.

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