Conform to orders, being extra yielding at first (4)
I believe the answer is:
obey
'conform to' is the definition.
(I've seen this before)
'orders being extra yielding at first' is the wordplay.
'at first' indicates taking the first letters.
The initial letters of 'orders being extra yielding' is 'OBEY'.
(Other definitions for obey that I've seen before include "Comply with orders" , "Accept instructions" , "Comply with (instructions)" , "Carry out (an order)" , "Be ruled by" .)