The most common and most likely answer to this crossword clue is the 6 plus 4 letter word ORANGE PEEL
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More clues leading to the result ORANGE PEEL
- General depot, but not housing, developed in Seville cover-up?
- Oscar called Steed’s sidekick, I suppose, sugar-coated candy?
- Political hue of DUP when united with PM
- , 18 across. Dimpled skin left on primate with sword
- One grape munched by the Spanish — bit of fruit often discarded
- Rind found in a green Opel, rotted
- Zero scope left after water becomes marmalade ingredient
- Skin around navel?
Buddy explains!

The straight part
We know that "mandarin, outwardly?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case mandarin, outwardly? = orange peel.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.