English saint shaves head inside (6)
I believe the answer is:
within
'inside' is the definition.
(synonyms)
'english saint shaves head' is the wordplay.
'english saint' becomes 'with' (I can't explain this - if you can you should give a lot more credence to this answer).
'shaves' means to look at the middle letters (I've seen 'shaved' mean this).
'head' becomes 'mind' (synonyms).
The central letters of 'mind' are 'in'.
'with'+'in'='WITHIN'
Can you help me to learn more?
(Other definitions for within that I've seen before include "Don't let it go beyond this room!" , "Internal to" , "Not going beyond" , "Indoors" , "Internally" .)