Here are the possible solutions for they cause strikes clue
Answer
Clue
Relevancy
fouls
Clue
They cause strikes
Definition
FOUL, to make dirty
assists
Clue
They might lead to Lightning strikes
Definition
ASSIST, to give aid or support to
scabs
Clue
They work during strikes
umps
Clue
They call strikes
They call balls and strikes at a ballpark
They call balls and strikes
unions
Clue
They sometimes call strikes
moet
Clue
"The ___ and Alize keep me pissy / Girls used to diss me / Now they write letters 'cause they miss me" (Notorious B.I.G. lyric name-checking his fancy champagne diet)