The most common and most likely answer to this crossword clue is the 11 letter word ARRANGEMENT
I've seen this crossword clue in The Times
A
R
R
A
N
G
E
M
E
N
T
More clues leading to the result ARRANGEMENT
- US agents kidnap Egyptian as part of gross contract
- Understanding an order
- Order a contract
- Energy-packed FBI agents, in absolute terms
- Organisation great men ran badly
- . Score ten and manager wildly grabs winger’s bottom
- Order called English troops to get into craft
- Reach workers absorbed by craft set-up
- Row with people entering into cunning deal
Buddy explains!

The straight part
We know that "terms" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case terms = arrangement.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 ARRANGEMENT mean?
ARRANGEMENT noun- The act of arranging.
- The manner of being arranged.
- A collection of things that have been arranged.
- A particular way in which items are organized.
- (in the plural) Preparations for some undertaking.
- An agreement.
- An adaptation of a piece of music for other instruments, or in another style.