It gives some support to a girl on stage (3,3)
I believe the answer is:
peg leg
'it gives some support' is the definition.
The definition suggests a singular noun which matches the answer.
'a girl on stage' is the wordplay.
'a girl' becomes 'peg' (**).
'on' says to put letters next to each other.
'stage' becomes 'leg' ('leg' can be a synonym of 'stage').
'peg'+'leg'='PEG-LEG'
'to' is the link.
Can you help me to learn more?
(Other definitions for peg leg that I've seen before include "New member to support" , "Eg. Long John Silver" , "Artificial limb (usually of wood)" , "Artificial limb (informal)" , "Silver piece's replacement" .)