The most common and most likely answer to this crossword clue is the 5 letter word TROVE
T
R
O
V
E
More clues leading to the result TROVE
- Some find missing beginner tried hard
- Time wasted over valuable find
- Tons wander around store with valuables
- Somewhat controversial treasure
- Rich source of voter manipulation
- Some find controversy is enthralling
- With sun disappearing, tried very hard to find treasure
- Heading off, endeavoured to find some treasure
- Valuable collection lets Tory leader gallivant
- Valuable collection is the last in art range
Buddy explains!

The straight part
We know that "rich source (usually of treasure)" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rich source (usually of treasure) = trove.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 TROVE mean?
TROVE noun- A treasure trove; a collection of treasure.
- A collection of things.