Cryptic crossword clue
Supported by [amazingly] cheerful working 4

The most common and most likely answer to this crossword clue is the 4 letter word UPON

U
P
O
N


Buddy explains!

The straight part
We know that "Supported by" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case supported by = upon.
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 UPON mean?

UPON adverb
  1. Being the target of an action.
UPON preposition
  1. Physically above and in contact with.
  2. Physically directly supported by.
  3. Being followed by another so as to form a series.
  4. At (a prescribed point in time).
  5. On.

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