Look in shade for hooker (5)
I believe the answer is:
talon
'hooker' is the definition.
(I've seen this before)
'look in shade' is the wordplay.
'look' becomes 'lo' (archaic exclamation meaning 'look!').
'in' is an insertion indicator.
'shade' becomes 'tan' (I have seen 'Shade of brown' mean 'tan' so perhaps 'shade' could also mean 'tan').
'lo' inserted into 'tan' is 'TALON'.
'for' acts as a link.
(Other definitions for talon that I've seen before include "One hooked on bird" , "part to make savage cuts" , "The stock" , "Prey-bird's claw" , "Claw; undealt cards" .)