Adam's ale (5)
'adam's ale' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for water that I've seen before include "Commonest fluid" , "Adam's ale" , "Superior's full of it" , "H20" , "Compound of hydrogen and oxygen" .)
(Other definitions for estop that I've seen before include "term in law" , "Legally prevent" , "Bar, for a lawyer" , "Legally check" , "Preclude certain evidence (at law) - bar (archaic)" .)
(Other definitions for crawl that I've seen before include "Unusually slow rate of movement" , "Go slow" , "Be obsequious; swimming stroke" , "fawn" , "Progress, slow on land but fast in water" .)
(Other definitions for largo that I've seen before include "Slow and dignified, like Handel's composition" , "Musically in slow tempo and dignified style" , "Deliberately" , "Mus. slow movement" , "taking it steady" .)
(Other definitions for plays that I've seen before include "Stage works" , "Theatrical works" , "Frolics" , "Dramas" , "Dramatist's works" .)