The most common and most likely answer to this crossword clue is the 2 plus 5 letter word TO SPARE
I've seen this crossword clue in The Times
T
O
S
P
A
R
E
More clues leading to the result TO SPARE
- Moved fast around resort — more than needed
- Remaining seaport bombed
- Raced round Bath, say, more than necessary
- Extra box with digit on the outside
- Surplus kept by Otto’s parents
- Over time, sailor gets trim
- Extra rushed round resort
- Extra water source included in rent
- Left over in seaport abroad
- Extra digit written outside box
Buddy explains!

The straight part
We know that "more than needed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case more than needed = to spare.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.