Azed 2294
20d) Trembling state after two successive helpings of liquor. (6)
Quaver
Two successive letters of 'Liquor' - QU + Aver (State)
Surprisingly 'Trembling' can be a noun.
2. trembling (n.)
a shaky motion
Synonyms:
tremolo, quiver, quivering, vibration, palpitation, motion, shakiness, tremor,