Clue: Support for The Scaffold's turn: origins of Lily the Pink boosted university visits (6)
Answer: PUTLOG
Explanation: Definition: Support for The Scaffold
An envelope ('visits') of U ('university') in PTLOG, a reversal ('boosted' – not 'turn' doing double duty) of GO ('turn') plus LTP ('origins of **L**ily **T**he** P**ink'). Another Chambers nugget: **putlog** *n* a crosspiece in a scaffolding, the inner end resting in a hole left in a wall