Information about senior staff in plant (9)
I believe the answer is:
goldenrod
'in plant' is the definition.
'goldenrod' can be an answer for 'plant' (I've seen this before). I'm unsure of the 'in' bit.
'information about senior staff' is the wordplay.
'information' becomes 'gen' (gen is a kind of information).
'about' is an insertion indicator.
'senior' becomes 'old' ('old' can be similar in meaning to 'senior').
'staff' becomes 'rod' (I've seen this before).
'gen' placed around 'old' is 'golden'.
'golden'+'rod'='GOLDENROD'
Can you help me to learn more?
(Other definitions for goldenrod that I've seen before include "Plant with spikes of tiny golden flowers" , "Yellow-headed garden plant" , "Yellow-spiked garden flower" , "Yellow-flowered plant" , "Autumnal plant" .)