Pursuer reaches out without energy (6)
I believe the answer is:
chaser
'pursuer' is the definition.
('chaser' can be a synonym of 'pursuer')
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for chaser that I've seen before include "Drink following one of another sort" , "Racehorse - search (anag)" , "different drink to follow" , "Beer after spirits e.g." , "Drink that follows immediately after another one" .)