Assorted underwater explorers with energy (7)
I believe the answer is:
diverse
'assorted' is the definition.
(I've seen this before)
'explorers with energy' is the wordplay.
'explorers' becomes 'divers' (diver is a kind of explorer).
'with' is a charade indicator (letters next to each other).
'energy' becomes 'e' (physics symbol as in E=mc2).
'divers'+'e'='DIVERSE'
'underwater' acts as a link.
This may not be right. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for diverse that I've seen before include "Different and various" , "Miscellaneous" , "Of different kind or variety" , "Book" , "Sundry" .)