Military display may be dear to dad (6)
I believe the answer is:
parade
'military display' is the definition.
'parade' can be an answer for 'display' (parade is a kind of display). I'm not certain of the 'military' bit.
'may be dear to dad' is the wordplay.
'may be' indicates anagramming the letters.
'to' means one lot of letters go next to another (I've seen this in other clues).
'dad' becomes 'pa' (synonyms).
'dear' with letters rearranged gives 'rade'.
'rade' put after 'pa' is 'PARADE'.
Can you help me to learn more?
(Other definitions for parade that I've seen before include "Flaunt; ceremonial march" , "Public procession or ceremonial march" , "exhibition" , "Easter ___ , 1948 film with Judy Garland and Fred Astaire" , "Carnival" .)