First of errors by steeplejack's ending in inaccurate inspection (4-3)
I believe the answer is:
look-see
'inspection' is the definition.
(I've seen this before)
'first of errors by steeplejack's ending in inaccurate' is the wordplay.
'first of errors' becomes 'e' (lst letter of 'errors').
'by' says to put letters next to each other.
'steeplejack' becomes 'looks' (I can't explain this - if you can you should give a lot more credence to this answer).
'ending in' indicates one should take the final letters.
The final letter of 'inaccurate' is 'e'.
'e' put after 'looks' is 'lookse'.
'lookse'+'e'='LOOK-SEE'
Can you help me to learn more?
(Other definitions for look-see that I've seen before include "Survey, inspection" , "Inspection (colloq.)" , "Brief inspection" , "Dekko" , "Young's - relates stress and strain (Physics)" .)