The most common and most likely answer to this crossword clue is the 8 letter word ABUNDANT
I've seen this crossword clue in The Daily Telegraph
A
B
U
N
D
A
N
T
More clues leading to the result ABUNDANT
- Key worker’s supporting sailor’s international body is more than enough
- A bread roll and crackers with tea, say, in great supply
- Ample to make a small cake and possibly tea, say
- Ample supply coming from British sailor and German worker
- A friend accepting new worker of a bountiful nature
- profuse
- Notice six-footer eating cake that’s rich
- Notice worker eating cake that’s rich
- Sailor and German soldier could be all over the place
- A bit of food poet left unfinished — more than enough?
Buddy explains!

The straight part
We know that "rich" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rich = abundant.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 ABUNDANT mean?
ABUNDANT adjective- Fully sufficient; found in copious supply; in great quantity; overflowing.
- Richly supplied; wealthy; possessing in great quantity.
- Being an abundant number, i.e. less than the sum of all of its divisors except itself.