Crop managed to speak of a large company (9)
I believe the answer is:
corporate
'of a large company' is the definition.
(I've seen this before)
'crop managed to speak' is the wordplay.
'managed' indicates anagramming the letters.
'to speak' becomes 'orate' (orating is a kind of speaking).
'crop' anagrammed gives 'corp'.
'corp'+'orate'='CORPORATE'
(Other definitions for corporate that I've seen before include "Of a legal entity acting as an individual" , "Relating to a large group or company" , "Relating to a large group; united" , "belonging to a large company" , "Poor crate could be legally united into a body" .)