Peat moss (8)
I believe the answer is:
sphagnum
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">peat moss</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sphagnum that I've seen before include "Peat moss - push G-man (anag)" , "Type of moss" , "Pale peat moss -- human GPs (anag)" , "Kind of moss that grows on bogs" , "Peat moss plant" .)