Pleased at cheque finally clearing (5)
I believe the answer is:
glade
'clearing' is the definition.
(synonyms)
'pleased at cheque finally' is the wordplay.
'pleased' becomes 'glad' (similar in meaning).
'at' is a charade indicator (letters next to each other).
'finally' indicates one should take the final letters.
The last letter of 'cheque' is 'e'.
'glad'+'e'='GLADE'
(Other definitions for glade that I've seen before include "wood's open space" , "Break in wooded area" , "Clearing in a wooded area" , "Forest clearing" , "Woodland open space" .)