Beer bottles by bar spinning? (4)
I believe the answer is:
axle
'bar spinning?' is the definition.
'axle' can be an answer for 'bar' (I've seen this before). I'm unsure of the 'spinning?' bit.
'beer bottles by' is the wordplay.
'beer' becomes 'ale' (type of beer).
'bottles' is an insertion indicator (bottle can mean to contain).
'by' becomes 'x' (2 by 4 is 2 x 4).
'ale' going around 'x' is 'AXLE'.
Can you help me to learn more?
(Other definitions for axle that I've seen before include "Bar on which wheels rotate" , "Rod of wheelbase" , "I take the wheel" , "Wheel pivot" , "Rod making wheels turn" .)