Players without vigour, needing energy boosted? (4)
I believe the answer is:
team
'players' is the definition.
(sports team)
'without vigour needing energy boosted?' is the wordplay.
I cannot really understand how this works, but
'energy' could be 'e' (physics symbol as in E=mc2) and 'e' is found in the answer.
The remaining letters 'tam' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for team that I've seen before include "Side; match" , "Crew" , "Squad; side" , "Cooperating group" , "People working together" .)