The most common and most likely answer to this crossword clue is the 7 letter word BLOOMED
I've seen this crossword clue in The Times
B
L
O
O
M
E
D
More clues leading to the result BLOOMED
Buddy explains!
The straight part
We know that "that’s what it’s done" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that’s what it’s done = bloomed.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 BLOOMED mean?
BLOOMED verb- To cause to blossom; to make flourish.
- To bestow a bloom upon; to make blooming or radiant.
- Of a plant, to produce blooms; to open its blooms.
- Of a person, business, etc, to flourish; to be in a state of healthful, growing youth and vigour; to show beauty and freshness.
- (Cooking) To bring out the flavor of a spice by cooking it in oil.