In mother's embrace, do wrong, I see, just a little (7)
I believe the answer is:
modicum
'just a little' is the definition.
(I've seen this before)
'in mother's embrace do wrong i see' is the subsidiary indication.
'in' indicates putting letters inside.
'mother' becomes 'mum' (mum is a kind of mother**).
'embrace' is an insertion indicator.
'wrong' indicates anagramming the letters.
'see' becomes 'c' (the word for the letter, according to Chambers).
'do' anagrammed gives 'od'.
'mum' enclosing 'od' is 'modum'.
'i'+'c'='ic'
'modum' placed around 'ic' is 'modicum'.
(Other definitions for modicum that I've seen before include "Tad" , "touch" , "Little bit" , "I cod Mum into providing a small quantity" , "Token amount" .)