Garden plant had trouble, each part being twisted (6)
I believe the answer is:
dahlia
'garden plant' is the definition.
(I've seen this before)
'had trouble each part being twisted' is the wordplay.
'had' becomes 'd' (in contractions e.g. 'I'd', 'you'd' etc).
'trouble' becomes 'ail' (synonyms).
'each part' becomes 'ha' (I can't justify this - if you can you should believe this answer much more).
'being twisted' says the letters should be written in reverse.
'ail'+'ha'='ailha'
'ailha' written backwards gives 'ahlia'.
'd'+'ahlia'='DAHLIA'
Can you help me to learn more?
(Other definitions for dahlia that I've seen before include "Tuberous plant with showy flowers" , "conspicuous bloomer" , "Showy bloom" , "Showy flower from Mexico" , "Flower named after a Swedish botanist, d. 1789" .)