Biased in favour but continued to hang on say (8)
I believe the answer is:
weighted
'biased in favour' is the definition.
'weighted' can be an answer for 'biased' (as in a biased or weighted sample). I'm not certain of the 'in favour' bit.
'but continued to hang on say' is the wordplay.
'but continued' becomes 'ed' (I can't justify this - if you can you should give a lot more credence to this answer).
'to' means one lot of letters go next to another (I've seen this in other clues).
'hang on' becomes 'wait' (I've seen this in another clue).
'say' indicates a 'sounds like' (homophone) clue.
'wait' sounds like 'weight'.
'ed' after 'weight' is 'WEIGHTED'.
Can you help me to learn more?
(Other definitions for weighted that I've seen before include "loaded" , "Given a bias" , "having extra burden to carry" , "Made heavier" .)