See odd bits of shamrock as some sort of derisive irony (7)
I believe the answer is:
sarcasm
'sort of derisive irony' is the definition.
'sarcasm' can be an answer for 'irony' (synonyms). I'm not certain of the 'sort of derisive' bit.
'see odd bits of shamrock as some' is the wordplay.
'see odd bits of' means one should take alternating letters.
'shamrock'+'as'+'some'='shamrockassome'
The alternating letters of 'shamrockassome' are 'SARCASM'.
Can you help me to learn more?
(Other definitions for sarcasm that I've seen before include "Ironic wit" , "Mocking words intended to insult" , "Language expressing scorn or contempt" , "Insulting lingo" , "Mocking irony" .)