Little man in the pink? (6)
I believe the answer is:
shrimp
I believe this is a double definition.
'little man' is the first definition.
(term for a short or puny person)
'the pink?' is the second definition.
(shrimp is a shade of pink)
'in' acts as a link.
(Other definitions for shrimp that I've seen before include "no giant" , "Seafood" , "ingredient of cocktail" , "Small crustacean often found in cocktail" , "Diminutive person" .)