Some baseball starts, featuring only the best players (3-4)
I believe the answer is:
all-star
'the best players' is the definition.
(I've seen this before)
'some baseball starts featuring' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'ALL-STAR' can be found hidden inside 'baseball starts featuring'.
'only' acts as a link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for all-star that I've seen before include "Composed wholly of top performers" , "Packed with celebrities" , "Comprising only top performers" , "Featuring only celebrities" , "(Of cast or team) made up entirely of the famous" .)