The most common and most likely answer to this crossword clue is the 3 plus 2 letter word LAP UP
L
A
P
U
P
More clues leading to the result LAP UP
- Readily accept tour is over
- Relish large thing sold dishonestly?
- Really like the French poodle, say
- Like a lavish meal, but with no starter to relish
- Credulously accept what makes a friend?
- Readily believe in return of future monarch?
- Delight in genital area on getting out of bed
- Delight in friend elevated into prominence
- Readily accept return of an immature creature
- Eagerly welcome LaMotta, discontented young boxer?
Buddy explains!

The straight part
We know that "Take in enthusiastically" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case take in enthusiastically = lap up.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.