Tendency not to move when snakes are in it (7)
I believe the answer is:
inertia
'tendency' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'not to move when snakes are in it' is the wordplay.
'are in it' can be anagrammed to 'INERTIA'.
However, I am not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for inertia that I've seen before include "Tendency to inactivity" , "Disposition to do nothing" , "lack of action" , "inclination not to budge" , "I retain (anag) - the tendency to retain same speed and direction" .)