Square, on occasions? (5)
I believe the answer is:
times
'square on occasions?' is the definition.
'times' can be an answer for 'occasions?' (I've seen this before). I am not certain of the 'square on' bit.
'square on occasions?' is the wordplay.
'square' becomes 'T' (a T-Square is a technical drawing instrument).
'on occasions?' becomes 'imes' (I am not sure about this - if you are sure you should believe this answer much more).
't'+'imes'='TIMES'
Can you help me to learn more?
(Other definitions for times that I've seen before include "See 1" , "measures the length of something" , "''For the ..., they are a'changin'''(Bob Dylan)" , "Paper" , "Occasions; multiplied by" .)