The most common and most likely answer to this crossword clue is the 4 letter word SHEA
S
H
E
A
Buddy explains!
The straight part
We know that "spot where the Mets once played" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case spot where the mets once played = shea.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 SHEA mean?
SHEA noun- A tree (Vitellaria paradoxa) indigenous to Africa, occurring in Mali, Cameroon, Congo, Côte d'Ivoire, Ghana, Guinea, Togo, Nigeria, Senegal, Sudan, Burkina Faso and Uganda.
- The fruit of this tree, having a thin, tart, nutritious pulp that surrounds a relatively large, oil-rich seed.