Not much fun for a doctor and a seaman (4)
I believe the answer is:
drab
'not much fun' is the definition.
Both the answer and definition are adjectives. Maybe there's an association between them I don't understand?
'doctor and a seaman' is the wordplay.
'doctor' becomes 'dr' (abbreviation).
'and' means one lot of letters go next to another.
'a seaman' becomes 'ab' (short for able seaman).
'dr'+'ab'='DRAB'
'for a' is the link.
Can you help me to learn more?
(Other definitions for drab that I've seen before include "Dismal < slattern" , "Dull sort of bard" , "Shabby; a slattern (arch.)" , "Cheerless, colourless" , "Drearily dull; slattern" .)