I am not sure it is an easy fold but if you call you are looking at having to call another bet at the river so you are getting reverse implied odds of 4.5:1 with a fairly weak hand. I don't lose much sleep by folding this one.

An interesting alternative for discussion might be to RERAISE to see what Villian will do. This will further define his hand and there is some change that HE will fold if he is holding TT and was "cleverly" slowplaying (folding with TT is, of course, an error because he has 8 outs to make a full house or quads) or a number of other holdings like KT, QT, JT, T9. If he caps it then he for sure has 89 (or awfully big huevos for a "passive" type). If he just calls it then depending on the river card there could be an opportunity to bluff on the river or check/call your top pair with the bigger pot.