Detailed plan to bring antelope up to little spot (7)
I believe the answer is:
speckle
'little spot' is the definition.
'detailed plan to bring antelope up' is the wordplay.
'detailed plan' becomes 'spec'.
'to bring antelope' becomes 'elk' (I can't explain this - if you can you should give a lot more credence to this answer).
'up' says the letters should be written backwards (in down clue: letters go upwards).
'elk' backwards is 'kle'.
'spec'+'kle'='SPECKLE'
'to' acts as a link.
(Other definitions for speckle that I've seen before include "pepper with colour" , "Small mark on skin" , "Small patch of colour" , "Bespatter" , "Little dot" .)