Agapanthus

A clue in Today's Sunday Times Mephisto crossword...
14D Plant, one occupying a space like this. (10)
I saw the answer to this straight away,,,
AGAPANTHUS
AN (one) inside [occupying] A GAP (a space) THUS (like this).
..as we have some lovely ones in pots by the front door, just coming into full bloom now!