The first man with market for water (5,3)
I believe the answer is:
adams ale
'water' is the definition.
(I've seen this before)
'the first man with market' is the subsidiary indication.
'the first man' becomes 'adam' (I've seen this before).
'with' says to put letters next to each other.
'market' becomes 'sale' (I've seen this in other clues).
'adam'+'sale'='adamsale'
'for' is the link.
(Other definitions for adams ale that I've seen before include "water instead" , "Water (humorous)" , "simple drink" , "Relaxed, tolerant" , "Liquid refreshment" .)