Cryptic crossword clue
Government ministry united by overdue change 8

The most common and most likely answer to this crossword clue is the 8 letter word MODULATE

I've seen this crossword clue in The Guardian
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Buddy explains!

The straight part
We know that "change" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case change = modulate.
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 MODULATE mean?

MODULATE verb
  1. To regulate, adjust or adapt
  2. To change the pitch, intensity or tone of one's voice or of a musical instrument
  3. To vary the amplitude, frequency or phase of a carrier wave in proportion to the amplitude etc of a source wave (such as speech or music)
  4. To move from one key or tonality to another, especially by using a chord progression

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