Bracken, eg (4)
I believe the answer is:
fern
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bracken eg</span>' is the definition.<br/ ><span class="explanation-format__explanation">(bracken is a kind of fern)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for fern that I've seen before include "Bracken, for example" , "Feathery-leaved plant" , "Flowerless plant with feathery green leaves, common on mountains" , "Often shady plant" , "Type of plant" .)