The most common and most likely answer to this crossword clue is the 7 letter word DOORMAN
I've seen this crossword clue in The Times
D
O
O
R
M
A
N
More clues leading to the result DOORMAN
- Hotel worker, old, inactive, mostly sits around
- Commissionaire almost asleep — nothing coming in
- One who welcomes party with alternative staff
- One who may help guest Norma, drunk after party
- Guard rum and room
- At the entrance he has a choice to work both sides
- Gatekeeper abducted by tandoor manufacturers?
- Crack actor resolved to take up position as bouncer
Buddy explains!

The straight part
We know that "Commissionaire" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case commissionaire = doorman.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 DOORMAN mean?
DOORMAN noun- A person who holds open the door at the entrance to a building, summons taxicabs, and provides an element of security; in apartment buildings, he also accepts deliveries and may perform certain concierge type services.