What does the cryptic crossword clue "Beer knocked back by far ramp in dock (7)" mean?

The definition is "ramp in dock". The wordplay uses a reversal. PILS (reversal="beer") + WAY (synonym="far") = SLIPWAY The answer is SLIPWAY.

Beer knocked back by far ramp in dock (7)

Independent Cryptic #11640 | 17 Across | 2024-01-31 flower