Breaking toe, cries inside (8)
I believe the answer is:
esoteric
'inside' is the definition.
(thesaurus)
'breaking toe cries' is the wordplay.
'breaking' indicates anagramming the letters.
'toe'+'cries'='toecries'
'toecries' with letters rearranged gives 'ESOTERIC'.
(Other definitions for esoteric that I've seen before include "Intended for the few" , "Mysterious to all but a chosen few" , "I set core up to be mysterious" , "just seen by specialist" , "Tie score (anagram)" .)