NL 50: Flopped Nut Flush and get action

[Berge20]

Villian is 17/5/3.5 over large sample, sees 19% of SDs
Hero is 16/12/Inf at this table

No notable history, poor note taking on my part. We are ~150bb deep. Is this flop line ideal or can we flat call and risk the board pairing? He's obviously not an idiot and I'm OOP holding the Ace, so he can't be raising a naked nut FD--although he could hold the Jc, I suppose.

PokerStars No-Limit Hold'em, $0.50 BB (8 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($72.85)
BB ($118.35)
UTG ($50)
UTG+1 ($63.15)
MP1 ($45.25)
MP2 ($131.65)
CO ($50)
Button ($123.50)

Preflop: Hero is SB with 8[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img]. UTG posts a blind of $0.50.
UTG (poster) checks, <font color="#666666">2 folds</font>, MP2 calls $0.50, <font color="#666666">1 fold</font>, Button calls $0.50, Hero completes, BB checks.

Flop: ($2.50) 9[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">Hero bets $2</font>, BB folds, UTG folds, MP2 folds, <font color="#CC3333">Button raises to $5</font>, <font color="#CC3333">Hero raises to $14