The most common and most likely answer to this crossword clue is the 3 plus 2 plus 2 letter word LET IT BE
I've seen this crossword clue in The Times
L
E
T
I
T
B
E
More clues leading to the result LET IT BE
- Title composed by Beatles’ leading pair?
- Title originally used by leading pair of Beatles?
- Single insatiable tit beholds sandwiches
- Stop tinkering with that song!
- Beatles song, The French Bird, live
- Tie and belt buckle – stop interfering!
- Tie belt awkwardly, getting number
- Song title tweaked by Elvis, originally
- The Beatles’ 10?
- Instruction to ignore Beatles song
Buddy explains!

The straight part
We know that "Title composed by Beatles’ leading pair?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case title composed by beatles’ leading pair? = let it be.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.