Perform wearing hat, being touchy? (7)
I believe the answer is:
tactile
'touchy?' is the definition.
(tactile can mean relating to touch)
'perform wearing hat' is the wordplay.
'perform' becomes 'act' (acting is a kind of performing).
'wearing' is an insertion indicator.
'hat' becomes 'tile' (old-fashioned term for a hat).
'act' inserted into 'tile' is 'TACTILE'.
'being' is the link.
(Other definitions for tactile that I've seen before include "Touchy-feely" , "Haptic" , "Lattice (anag.)" , "Hands-on" , "Lattice being sensitive to touch" .)