Skilful lower socio-economic groups supported by newspaper (4)
I believe the answer is:
deft
'skilful' is the definition.
(I've seen this before)
'lower socio-economic groups supported by newspaper' is the wordplay.
'lower socio-economic groups' becomes 'de' (I can't justify this - if you can you should believe this answer much more).
'supported by' is a charade indicator (letters next to each other) (letters go below - in down clue).
'newspaper' becomes 'ft' (Financial Times newspaper).
'de'+'ft'='DEFT'
Can you help me to learn more?
(Other definitions for deft that I've seen before include "Adept" , "Adriot and skilful" , "Skilful, handling things easily" , "Quick and effective" , "Proficient" .)