Resolved to hold off taking up denim (10)
I believe the answer is:
determined
'resolved' is the definition.
(I've seen this before)
'hold off taking up denim' is the wordplay.
'hold off' becomes 'deter' (I am not sure about this - if you are sure you should believe this answer much more).
'taking' is a charade indicator (letters next to each other).
'up' is a reversal indicator (in down clue: letters go upwards).
'denim' backwards is 'mined'.
'deter'+'mined'='DETERMINED'
'to' is the link.
Can you help me to learn more?
(Other definitions for determined that I've seen before include "Decided - resolute" , "firm" , "settled" , "set" , "Resolved" .)