The most common and most likely answer to this crossword clue is the 7 letter word EPSTEIN
I've seen this crossword clue in Independent
E
P
S
T
E
I
N
More clues leading to the result EPSTEIN
- Group's manager’s records, note, at home
- Sculptor records note with it
- Note appended to records by popular artist
- Band manager records “One in Ten”
- Records note popular sculptor
- Sculptor on record as having large mug!
- Nuisance lowering head before one German artist
- Record lively set at home to show band’s manager
- One sent off to support recording artist
- Sculptor putting extreme pressure on mug
Buddy explains!
The straight part
We know that "A rock band manager" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a rock band manager = epstein.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.