Small amount of comfort? (5)
I believe the answer is:
crumb
'small amount' is the definition.
'crumb' can be an answer for 'amount' (crumb is a kind of amount). I am not sure about the 'small' bit.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for crumb that I've seen before include "Small morsel" , "Small piece of bread (or comfort!)" , "Just a little bit" , "Tiny piece of bread or cake" , "Morsel of bread" .)