Parking by lake facility to give satisfaction (6)
I believe the answer is:
please
'give satisfaction' is the definition.
(I've seen this before)
'parking by lake facility' is the wordplay.
'parking' becomes 'p'.
'by' means one lot of letters go next to another.
'lake' becomes 'l'.
'facility' becomes 'ease' (I've seen this before).
'p'+'l'+'ease'='PLEASE'
'to' is the link.
(Other definitions for please that I've seen before include "Make cheerful" , "Delight, satisfy" , "Like" , "Gratify or ask nicely" , "Cause to feel happy" .)