Air even circulating around article stuffed in crack (9)
I believe the answer is:
ventilate
'crack' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Maybe they are linked in a way I don't understand?
'air even circulating around article stuffed in' is the wordplay.
'air' becomes 'tilt' (I can't explain this - if you can you should believe this answer much more).
'circulating' indicates anagramming the letters.
'around' means one lot of letters goes inside another.
'article' becomes 'a' (the indefinite article in English).
'stuffed in' indicates putting letters inside.
'even' anagrammed gives 'vene'.
'tilt' placed within 'vene' is 'ventilte'.
'ventilte' placed around 'a' is 'VENTILATE'.
Can you help me to learn more?
(Other definitions for ventilate that I've seen before include "Fan" , "Let air enter and circulate" , "Expose to a current of fresh air" , "Allow fresh air to circulate" , "Superficial" .)