Some developer to run away secretly (5)
I believe the answer is:
elope
'run away secretly' is the definition.
(synonyms)
'some developer to' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'ELOPE' is hidden within 'developer to'.
(Other definitions for elope that I've seen before include "Run away secretly to marry" , "Bolt" , "Run away with one's beloved" , "Do a runner" , "Flee to wed" .)