Run from a couple of pints, I see, preferring water (7)
I believe the answer is:
aquatic
'preferring water' is the definition.
I can't tell whether this definition defines the answer.
'run from a couple of pints i see' is the wordplay.
'run' becomes 'r' (cricket abbreviation).
'from' is a deletion indicator.
'couple of pints' becomes 'quart' (a quart is equal to two pints).
'see' becomes 'C' (the word for the letter, according to Chambers).
'a'+'quart'='aquart'
'aquart' with 'r' taken out is 'aquat'.
'aquat'+'i'+'c'='AQUATIC'
Can you help me to learn more?
(Other definitions for aquatic that I've seen before include "Plant living in water" , "At home in water" , "Linked to water" , "Pertaining to water" , "Living in/near water" .)