The most common and most likely answer to this crossword clue is the 7 letter word SADDLER
I've seen this crossword clue in The Daily Telegraph
S
A
D
D
L
E
R
More clues leading to the result SADDLER
- Tack supplier’s son finally fell, bitten by snake
- Small snake corners large one who makes you bridle
- Small 1D, perhaps, heading off to find one providing resting place for bums
- Senior, quaintly rotten inside, whose clients put something on the horses
- Tradesperson not so happy to accommodate learner
- All this worker makes going on the horses?
- One who’d be less happy about minimal supply of leather?
- One providing something to help a person sit up
- Leather-worker not so happy about pound
- Provider of seats, bluer across length
Buddy explains!

The straight part
We know that "Provider of seats" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case provider of seats = saddler.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 SADDLER mean?
SADDLER noun- Someone who makes, repairs and sells saddles, harnesses etc.
- The harp seal.