I think betting the turn is fine but I would fold to the c/r. You have no outs vs any of his value range, he will likely continue with his bluffs on river and he has very few one club combos that make any sense. Like you said turn is debatable meaning it is right at the bottom of your value range so it makes sense from that perspective to fold it to a raise also.

i think we should be a bit more polarized with regards to our turn betting range than A3, although,  clearly if you can induce such nonsense by him bet-calling and calling rivers will be good though. i dont think he should be playing anything for value with this line and river was just an unfortunate bink 

i think if we are bet-folding A3 on the turn here we will be betting far too often and folding far too much of our range to a cr or the river bet 

I agree w/ Stevie, I also think if I bet the turn i'd check back a lot of rivers.  I don't think we bet folding the turn too much if we bet fold A3. We will have enough semibluffs that are getting priced into call or two pairs, sets, pair with clubs etc. that folding A3 w/o a club is fine.

Thanks for your thoughts.