With love list the German shrub (8)
I believe the answer is:
oleander
'shrub' is the definition.
(thesaurus)
'with love list the german' is the wordplay.
'with' says to put letters next to each other.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'list' becomes 'lean' (I've seen this before).
'the german' becomes 'der' ('the' in German).
'o' next to 'lean' is 'olean'.
'olean'+'der'='OLEANDER'
(Other definitions for oleander that I've seen before include "Adore Len (anag.)" , "bloomer" , "No leader, oddly, for the flowering shrub" , "Mediterranean shrub" , "Poisonous evergreen shrub with white, pink or red flowers" .)