The most common and most likely answer to this crossword clue is the 10 letter word SHOPAHOLIC
I've seen this crossword clue in Financial Times
S
H
O
P
A
H
O
L
I
C
More clues leading to the result SHOPAHOLIC
- Ooh! I love purchasing, initially getting cash out
- One who’s been down the aisle too often
- One always desperate to discover what’s in store?
- Cash pool I demolish ultimately on a spree?
- Cash Phil’s blown, including two noughts — that’s an incorrigible spender
- ‘Big Spender’ might symbolise this record buyer?
- A hip school trained compulsive buyer
Buddy explains!

The straight part
We know that "One who’s been down the aisle too often" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one who’s been down the aisle too often = shopaholic.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 SHOPAHOLIC mean?
SHOPAHOLIC noun- One who shops very frequently.
- Common term applied to someone suffering from oniomania.