Pulls up someone doing too much studying (4)
I believe the answer is:
tows
'pulls up someone doing' is the definition.
'tows' can be an answer for 'pulls' (I've seen this before). I am not sure about the 'up someone doing' bit.
'too much studying' is the wordplay.
'much' means to remove the last letter (much but not all of the word).
'studying' becomes 'ws' (I can't explain this - if you can you should give a lot more credence to this answer).
'too' with its last letter removed is 'to'.
'to'+'ws'='TOWS'
Can you help me to learn more?
(Other definitions for tows that I've seen before include "Tugs" , "Pulls" .)