Burn endlessly puts pressure on some skin (5)
I believe the answer is:
scalp
'some skin' is the definition.
(scalp is a kind of skin)
'burn endlessly puts pressure' is the wordplay.
'burn' becomes 'scald' (scalding is a kind of burning).
'endlessly' means to remove the last letter.
'puts pressure' becomes 'p' (I can't explain this - if you can you should give a lot more credence to this answer).
'scald' with its last letter removed is 'scal'.
'scal'+'p'='SCALP'
'on' acts as a link.
Can you help me to learn more?
(Other definitions for scalp that I've seen before include "Cut hair very short" , "Clasp (anag)" , "Skin with hair as trophy" , "Hair producer" , "Hirsute war trophy once taken by Native Americans" .)