A pet soil conditioner? (4)
I believe the answer is:
peat
'soil conditioner?' is the definition.
The answer and definition can be both substances as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'a pet' is the wordplay.
'a pet' anagrams to 'PEAT'.
Though, I am not sure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for peat that I've seen before include "load of stuff in the garden?" , "Fuel dug from bog" , "Tape (anag.)" , "Saturated and compressed vegetable matter, used as fuel when dried out" , "Form of fuel" .)