Excitedly urge man to keep one flower (8)
I believe the answer is:
geranium
'flower' is the definition.
(I've seen this before)
'excitedly urge man to keep one' is the wordplay.
'excitedly' indicates an anagram.
'to keep' indicates putting letters inside.
'one' becomes 'I' (Roman numeral).
'urge'+'man'='urgeman'
'urgeman' anagrammed gives 'geranum'.
'geranum' placed around 'i' is 'GERANIUM'.
(Other definitions for geranium that I've seen before include "Flower for a strange Maine rug" , "Commonly cultivated plant" , "Run image of the flower" , "Flower confused with pelargonium" , "Pelargonium (loosely)" .)