Great desire suspended by monarch (6)
I believe the answer is:
hunger
'great desire' is the definition.
'hunger' can be an answer for 'desire' (hunger is a kind of desire). I'm unsure of the 'great' bit.
'suspended by monarch' is the wordplay.
'suspended' becomes 'hung' (I've seen this before).
'by' means one lot of letters go next to another.
'monarch' becomes 'er' (abbreviation for Elizabeth Regina).
'hung'+'er'='HUNGER'
Can you help me to learn more?
(Other definitions for hunger that I've seen before include "Appetite" , "Longing for food" , "Strong desire - sort of strike?" , "Strong desire for food" , "more like a divided jury?" .)