Tesco ultimately wrong: supermarket out of Germany succeeded — one will open in the spring (6)
I believe the answer is:
oxalis
'germany succeeded one will open in the spring' is the definition.
I can't judge whether this defines the answer.
'tesco ultimately wrong supermarket out' is the wordplay.
'ultimately' indicates one should take the final letters.
'wrong' becomes 'x' (X is used to mark something as incorrect).
'supermarket out' becomes 'alis' (I can't justify this - if you can you should give a lot more credence to this answer).
The last letter of 'tesco' is 'o'.
'o'+'x'+'alis'='OXALIS'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for oxalis that I've seen before include "One responsible for technical matters for a play" , "Wood sorrel or related plant - Lao six (anag)" , "Genus including wood sorrels" , "Wood-sorrel genus" .)