The most common and most likely answer to this crossword clue is the 7 letter word SYRINGA
S
Y
R
I
N
G
A
More clues leading to the result SYRINGA
- Enemy agents quietly dropped next to a shrub
- Shrub recollected in Gray’s Inn mostly
- Is angry, having to move shrub
- Plant grains, scattered round bottom of driveway
- Phone in, say, about making 5 orange or lilac
- Lilac no good planted in troubled country
- Lilac band, say? One’s depressed about it
- Plant group in borders of shady area
Buddy explains!

The straight part
We know that "Plant" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case plant = syringa.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SYRINGA mean?
SYRINGA noun- Sweet mock orange, Philadelphus coronarius.
- Hence any of several flowering plants of the genus Philadelphus, such as now in the Western United States Philadelphus lewisii.
- Any of several flowering plants, of the genus Syringa, such as the lilacs.