Vera confused - stacking outside is most common (10)
I believe the answer is:
prevailing
'most common' is the definition.
'prevailing' can be an answer for 'common' (thesaurus). I am unsure of the 'most' bit.
'vera confused stacking outside' is the wordplay.
'confused' indicates anagramming the letters.
'stacking' becomes 'piling' ('pile' can be a synonym of 'stack').
'outside' is an insertion indicator (some letters go outside others).
'vera' with letters rearranged gives 'reva'.
'reva' put within 'piling' is 'PREVAILING'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for prevailing that I've seen before include "Generally accepted" , "ruling" , "victorious" .)