Trouble experienced lifting flower (6)
I believe the answer is:
dahlia
'flower' is the definition.
(I know that dahlia is a type of flower)
'trouble experienced lifting' is the wordplay.
'trouble' becomes 'ail' (synonyms).
'experienced' becomes 'had' (have can mean to experience or go through).
'lifting' shows that the letters should be reversed in order.
'ail'+'had'='ailhad'
'ailhad' written backwards gives 'DAHLIA'.
(Other definitions for dahlia that I've seen before include "Flower with pompom variety" , "Peculiar Ali had this flower" , "conspicuous bloomer" , "Ali had (anag) - showy flower" , "Wooster's aunt" .)