Start to gleefully present spreadsheet's content (5)
I believe the answer is:
ghost
'spreadsheet's content' is the definition.
'ghost' can be an answer for 'content' (ghost is a kind of content). I am unsure of the 'spreadsheet's' bit.
'start to gleefully present' is the wordplay.
'start to' says to take the initial letters.
'present' becomes 'host' (I've seen this before).
The initial letter of 'gleefully' is 'g'.
'g'+'host'='GHOST'
Can you help me to learn more?
(Other definitions for ghost that I've seen before include "Pen for another" , "Hamlet's spectral father" , "Spook, spectre" , "Spirit, spectre" , "Apparition; faint trace" .)