Ran wildly, pocketing underwear having made hay! (9)
I believe the answer is:
harvested
'made hay' is the definition.
(gathered crops)
'ran wildly pocketing underwear' is the wordplay.
'ran wildly' becomes 'hared' (hare can mean to run fast).
'pocketing' is an insertion indicator.
'underwear' becomes 'vest'.
'hared' placed around 'vest' is 'HARVESTED'.
'having' acts as a link.
(Other definitions for harvested that I've seen before include "Gathered, reaped" , "He starved (anag) -- gathered food" , "Gathered in the crops" .)