The most common and most likely answer to this crossword clue is the 5 letter word FEAST
I've seen this crossword clue in The Times
F
E
A
S
T
More clues leading to the result FEAST
- Refrain from eating inspiring oriental banquet
- Diet eating up energy? Do this instead?
- Son in extraordinary deed brings delight
- Around second part of Lent, don't eat sumptuous meal
- Meal giving minimum of enjoyment in Lent?
- Religious celebration fixed around 2nd February
- Dine well – it’s an accomplishment to eat seconds
- Iron a shirt, both sides, for banquet
- Big 22 perhaps lent banks euros
- Provided in cafe, a stonking big meal
Buddy explains!

The straight part
We know that "Do this instead" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case do this instead = feast.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 FEAST mean?
FEAST noun- A very large meal, often of a ceremonial nature.
- Something delightful
- A festival; a holy day or holiday; a solemn, or more commonly, a joyous, anniversary.
- To partake in a feast, or large meal.
- To dwell upon (something) with delight.
- To hold a feast in honor of (someone).
- To serve as a feast for; to feed sumptuously.