One missing dog shakes partner (9)
I believe the answer is:
colleague
'partner' is the definition.
(I've seen this before)
'one missing dog shakes' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
'shakes' could be 'ague' (I have seen 'the shakes' mean 'ague' so perhaps 'shakes' could also mean 'ague') and 'ague' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for colleague that I've seen before include "Partner's" , "China, perhaps" , "Partner" , "Associate" , "Fellow worker" .)