The most common and most likely answer to this crossword clue is the 3 plus 7 letter word LOS ANGELES
I've seen this crossword clue in The Sunday Telegraph
L
O
S
A
N
G
E
L
E
S
More clues leading to the result LOS ANGELES
- Marx died here, Engels also, strangely
- Galleons at sea finally move towards city on the Pacific
- Backer misses out in America
- City described briefly in French article
- Fancy Sloanes get leg over in city
- City fails without financial backer
- City‘s front line has exceptional goal sense
- Investor misses out in the US
- Cinematic location fails to entertain patron of the theatre
- Messenger is beaten going round metropolis
Buddy explains!
The straight part
We know that "city on Pacific" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case city on pacific = los angeles.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.