Being fresh and bright, is looked up to (3,4)
I believe the answer is:
new moon
'is looked up to' is the definition.
I can't judge whether this definition defines the answer.
'being fresh and bright' is the wordplay.
'being fresh' becomes 'new' ('new' is associated in meaning with 'fresh').
'and' means one lot of letters go next to another.
'bright' becomes 'moon' (I can't justify this - if you can you should believe this answer much more).
'new'+'moon'='NEW MOON'
Can you help me to learn more?
(Other definitions for new moon that I've seen before include "Heavenly crescent" , "Earth's satellite when appearing as a narrow crescent" , "Beginning of first quarter" , "First appearance of a waxing satellite" , "First phase(s) of lunar cycle" .)