Possible Clues:

• Plant it's no good planting in the country
• Enemy agents quietly dropped next to a shrub
• Shrub that's no good in Asian republic
• Incomplete spraying device found beside a shrub
• Is angry (anag.)
• Another name for the mock-orange or lilac shrub
• Country in which there is no good lilac
• Is angry about a tree
• Lilac (popularly, orange blossom)
• Within grassy ring, aquatic plant