The most common and most likely answer to this crossword clue is the 7 letter word YEARNER
I've seen this crossword clue in Financial Times
Y
E
A
R
N
E
R
More clues leading to the result YEARNER
- New queen after twelve months or longer
- One having a yen for money ultimately, someone bringing in cash
- Longer period of time with northern ruler
- One with strong liking missed cuddle occasionally from desperate dry-cleaner
- Yankee moneymaker, one with aspirations
- Longer piece from Yes and Queen enthrals composer
Buddy explains!
The straight part
We know that "Longer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case longer = yearner.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.