Cryptic crossword clue
Up-front requirement: change old pic on Tinder 12

The most common and most likely answer to this crossword clue is the 12 letter word PRECONDITION

I've seen this crossword clue in Independent
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Buddy explains!

The straight part
We know that "Up-front requirement" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case up-front requirement = precondition.
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 PRECONDITION mean?

PRECONDITION noun
  1. A requirement which must be satisfied before taking a course of action.
PRECONDITION verb
  1. To condition in advance

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