MSPM0G3507: MSPM0G3507 SPI slave mode combine input output in one frame

Part Number: MSPM0G3507

Hello,

Is any possible to make MSPM0G 3/4-wire SPI slave mode work for below input:

1. A frame is always 16bit. clock speed lower than 500khz.
2. normal case, it receives entire frame 16bit from master, 8bit instrustion plus 8bit input data 
3. some case, it receives first half frame with 8bit instruction, immediately, preloaded 8bit output data should be presented on the output pin according to clock in rising edge, feed to master.

Is any possible to implement? seems 3-wire PICO not able to do? acceptable case is PICO connect to POCI to build output? in the period of first half frame for instruction 8bit, the output pin must be high-z.