The most common and most likely answer to this crossword clue is the 4 plus 5 letter word EASY CHAIR
I've seen this crossword clue in Independent
E
A
S
Y
C
H
A
I
R
More clues leading to the result EASY CHAIR
- Undemanding university post where one sits back and relaxes?
- Place to park behind president, after a walk in the park
- Like pie, perhaps with tea, consuming one here?
- Failing to tax office furniture
- Academic sinecure? It supports one comfortably
- I say ‘Reach out, and relax in this‘
- Hollow story in every song that’s designed for relaxation
- Place to park rear end of university gravy train?
- Professorship a piece of cake? Relax here
- Undemanding church broadcast is a source of comfort
Buddy explains!

The straight part
We know that "relax in this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case relax in this = easy chair.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.