A long sentence that may not mean what it says (4)
I believe the answer is:
life
'a long sentence that may not mean what it says' is the definition.
'life' can be an answer for 'a long sentence' (I've seen this in another clue). I am not sure about the rest of the definition.
'a long sentence' is the wordplay.
'a long' becomes 'l'.
'sentence' becomes 'ife' (I can't justify this - if you can you should believe this answer much more).
'l'+'ife'='LIFE'
Can you help me to learn more?
(Other definitions for life that I've seen before include "Actuarial estimate of our remaining years" , "Vitality, vigour" , "Existence - biography" , "Birth to death" , "Baffin oiler (anag) - 7 film" .)