Tangled tape understood to be burnt (4)
I believe the answer is:
peat
'understood to be burnt' is the definition.
I can't tell whether this defines the answer.
'tangled tape' is the wordplay.
'tangled' is an anagram indicator.
'tape' anagrammed gives 'PEAT'.
Can you help me to learn more?
(Other definitions for peat that I've seen before include "Organic fuel" , "Fuel from marsh" , "Natural solid fuel" , "Fuel from boggy land" , "Partially carbonised vegetable matter used as a fuel when dried" .)