Little less than two weeks (3)
I believe the answer is:
wee
'little' is the definition.
(similar in meaning)
'less than two weeks' is the wordplay.
'two weeks' can mean two replacements for 'weeks'.
'less than' means to remove the last letter (not the full word).
'weeks' becomes 'ww' (the abbreviation for week written twice).
'weeks' becomes 'ee' (I can't explain this - if you can you should believe this answer much more).
'ww' with its final letter taken off is 'w'.
'w'+'ee'='WEE'
Can you help me to learn more?
(Other definitions for wee that I've seen before include "Small like Willie Winkie" , "(Scots) little" , "Tiny (Scot)" , "Little or tiny in Scotland" , "Slash" .)