Here are the possible solutions for obstructionist's word clue
Answer
Clue
Relevancy
nay
Clue
Obstructionist's word
Definition
a negative vote
naysayer
Clue
Obstructionist
Definition
one that denies or opposes something
thwarter
Clue
Obstructionist
fun
Clue
First word across in the first-ever crossword (1913) and the first of a dozen appearances of the word in this puzzle's grid, written word search-style (left, right, down, and diagonally) ... Can you f
Definition
to act playfully
adeste
Clue
First word of a song whose last word is "Dominum"
aloha
Clue
Greeting word or parting word
Definition
(Hawaiian) a greeting or farewell
anagram
Clue
Jumble wordplay applied to every Across answer except this one, yielding another word/word form
Definition
a word or phrase formed by the letters of another in different order
antonym
Clue
A word that means the opposite of another word (for example, "good" vs. "bad")