What is the feeling-clinging aggregate?
At Savatthi. There the Blessed One said, "Monks, there are these five clinging-aggregates. Which five? Form as a clinging-aggregate, feeling as a clinging-aggregate, perception as a clinging-aggregate, fabrications as a clinging-aggregate, consciousness as an a clinging-aggregate.
  
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  "And what is feeling? These six classes of feeling — feeling born of eye-contact, feeling born of ear-contact, feeling born of nose-contact, feeling born of tongue-contact, feeling born of body-contact, feeling born of intellect-contact: this is called feeling."
  
  -- SN 22.56
  
  "There are, O monks, these three feelings: pleasant feelings, painful feelings, and neither-painful-nor-pleasant feelings."
  
  -- SN 36.1
  
  "Whatever feeling is past, future, or present; internal or external; blatant or subtle; common or sublime; far or near: That is called the feeling aggregate."
  
  -- SN 22.48