The most common and most likely answer to this crossword clue is the 1 plus 4 letter word A GOGO
I've seen this crossword clue in Financial Times
A
G
O
G
O
More clues leading to the result A GOGO
- Love attempt to follow silver galore
- Back with vitality in abundance
- A couple of leaves? Or as many as you like
- Drive past houses in great quantities
- Eagerly excited, Olga’s opening in spades
- In excited eagerness, Owen’s opening in spades
- Anticipating love without limit
- Past success in abundance
- Eager to get support of old in large numbers
- Australian tries in abundance
Buddy explains!

The straight part
We know that "in spades" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case in spades = a gogo.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.