Flower provided by online store (6)
I believe the answer is:
amazon
'flower' is the definition.
(Amazon is an example)
'online store' is the wordplay.
I cannot quite see how this works, but
'online' could be 'on' (similar in meaning) and 'on' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'provided by' acts as a link.
Can you help me to learn more?
(Other definitions for amazon that I've seen before include "Great river of S America, or a tough woman" , "tropical fish swimming here" , "Mighty river of S America, or tough woman" , "One of a mythic nation of women warriors" , "banker" .)