For training perhaps, I see small children time and time again? (6,9)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

(PERHAPS + I + SEE + CH + T + T)*.  SMALL here doesn’t seem to be strictly necessary as CH is a valid abbreviation for “children”, so presumably it is either to assist with the w/p or help the surface, or both. Either way a great “All-in-one” clue.