Sayings with meanings not obvious from the words (6)
I believe the answer is:
idioms
'sayings with meanings not obvious from the words' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for idioms that I've seen before include "Dialects, vernaculars" , "Turns of phrase" , "Characteristic styles of expression, language or art" , "styles of speech" , "Group of words having a meaning not obvious from the words e.g over the moon" .)