Clue: Suggest upgrade to rear lift (5)
Answer: RAISE
Explanation: Definition: Suggest,upgrade,to rear,lift
 Multiple defns: 1st: …/bring ups, say, an issue for discussion; 2nd: …/to promote, say, from one class to another above; 3rd: …/to nurture babies or children to adulthood; and 4th: …/to physically or metaphorically bring from a lower to a higher position.