The most common and most likely answer to this crossword clue is the 8 letter word TOKENISM
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The straight part
We know that "Superficial concession" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case superficial concession = tokenism.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TOKENISM mean?
TOKENISM noun- A policy of formally complying with efforts to achieve a goal by making small, token gestures; especially to hire a minimal number of ethnically diverse or disadvantaged people