Found Iron Age building employing spades (8)
I believe the answer is:
organise
'found' is the definition.
('found'->'organize' is in my internal thesaurus and 'ize'->'ise')
'iron age building employing spades' is the wordplay.
'building' is an anagram indicator.
'employing' is an insertion indicator.
'spades' becomes 's' (abbreviation in card games).
'iron'+'age'='ironage'
'ironage' is an anagram of 'organie'.
'organie' placed around 's' is 'ORGANISE'.
(Other definitions for organise that I've seen before include "Arrange - as region (anag)" , "run" , "Plan, direct, co-ordinate" , "Arrange, plan or direct" , "Classify - Iron Ages (anag)" .)