Sun hat, large, keeping more or less for now (7)
I believe the answer is:
topical
'sun hat large keeping more or less for now' is the definition.
I can't judge whether this definition defines the answer.
'sun hat large keeping more or less for now' is the wordplay.
'sun hat' becomes 'topi' (I've seen this in another clue).
'large' becomes 'L' (eg in clothes sizes).
'keeping' indicates putting letters inside.
'more or less' becomes 'c' (abbreviation for 'circa', meaning approximately).
'for now' becomes 'a' (I can't explain this - if you can you should give a lot more credence to this answer).
'topi'+'l'='topil'
'c'+'a'='ca'
'topil' placed around 'ca' is 'TOPICAL'.
Can you help me to learn more?
(Other definitions for topical that I've seen before include "Applied externally" , "hot" , "Up to date" , "currently newsworthy" , "like this newspaper" .)