The most common and most likely answer to this crossword clue is the 4 letter word AWED
I've seen this crossword clue in The Guardian
A
W
E
D
More clues leading to the result AWED
- Fearful African leader to join Union
- A day to be overcome with wonder!
- Gripped by dread, having cut head off
- One getting married in a state of reverence
- Acting on day lost for words
- Did cow essentially eat grass?
- A day to be bowled over by wonder
- Return of early deposit by American could make you fearful
- Ace getting married is emotionally overwhelmed
- Amazed to be united under America’s leader
Buddy explains!

The straight part
We know that "lost for words" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lost for words = awed.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does AWED mean?
AWED verb- To inspire fear and reverence in.
- To control by inspiring dread.
- Filled with awe.
- Having or showing awe.